WEBVTT captioned by MetroWind

NOTE Introduction

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Hi my name is MetroWind.

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In this talk I will take you through my journey into Emacs themes.

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I am a long-time Emacs user. I started using

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Emacs since version 21.

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The goal of this talk is to inspire more people into making themes.

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Maybe you are already making themes.

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In that case I hope you could find some tips and tricks

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you know in this one

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I will basically go through all the themes

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that I created.

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But I think the most important thing

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here is to understand why some of

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the some of the colors are picked,

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and the motivations behind them.

NOTE Deviant

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So the first theme I created is

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called Deviant. It looks like this.

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The inspiration for this one is a

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website called DeviantArt. Basically I just

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use their color palette, you know, from their design.

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It was a like a community for indie artists.

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I was really into that, you know,

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back in the day so that’s that.

NOTE FlucUI

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Otherwise, nothing special. The next theme

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I created was called FlucUI

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It’s in MELPA.

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And let me just show you.

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So yeah that's how it looks like.

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So... but where where did the colors

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come from, right? To understand that,

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I'll need to take you back in time, you know, to where iOS 7

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was released by Apple. That was a

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big deal, because that popularized the idea

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of flat UI color designs; sorry, flat UI

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designs. And after that, everybody followed suit,

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and changed their design, you know

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of all of their websites and applications to use some sort of flat UI design concepts.

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And about the same time, there came a website called flatuicolors.com.

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It hosted one color palette,

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and that was really good!

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So I picked that as the basis of my theme.

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And initially I named it FlatUI,

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But that name was taken in MELPA

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So i just rename it to something random, FlucUI.

NOTE Lab

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The next one is called lab.

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To understand why I needed to create the theme,

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it's because I thought some of the colors in FlucUI

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was standing out too much, like the green here.

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This one.

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I thought this was too bright.

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Just a little bit.

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So I thought I needed way to pick

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some colors that are about the same

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lightness essentially. So how would I do that?

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The answer is to go into a color space called LAB.

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Now normally you'd do color work in RGB,

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which is red, green, and blue.

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It doesn't tell you a lot about lightness.

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If you do a pure blue,

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it actually looks a lot darker than a

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pure red or pure green. So that

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that doesn't work. But in LAB,

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thing are different, because one of the channel

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is L which is lightness. The other

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two channels are a and b, which are just

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for colors. This is great because

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I could just fix L meaning

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I fixed the lightness, and then I can

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vary a and b however I want.

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The color will stay roughly in the same

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lightness, which is exactly what I wanted.

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So for that I created a

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Mac app, where I could just

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fix lightness like I said, and then

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I could click on this colorful thing,

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to pick a color. The app will

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pick another five according to some pattern.

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And then I could just like hard-code

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these colors in Emacs.

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Let me show you.

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apply theme... lab...

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Yeah not very different from FlucUI colors,

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which was intentional.

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The idea here again is

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all the colors will be in about

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the same lightness, which I guess it was.

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So yeah... So this one was

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a success. I use it for a

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really long time. And then I got bored...

NOTE NotInk: grayscale

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So I needed something interesting.

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The idea at the time was then to create a theme

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that doesn't have any colors essentially.

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A grayscale theme. So I called

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it NotInk. It is also in Melpa

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It looks like this.

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Yeah like I said, everything is grey.

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There's no color. But to my

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surprise, this is actually very useable.

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I didn't have any problem in readability;

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I didn't have any problem distinguishing, you know,

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different elements in the code. So a

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big surprise. And also a big success actually.

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And then I got bored.

NOTE Random theme

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I just decided to install a whole bunch

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of themes from MELPA,

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and every time I start Emacs I

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just pick a random theme.

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There are some caveats to that,

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which I don't want to get into.

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But let me just show you.

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apply-random-theme, so it picked one for

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me. And then it picked another... another...

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So yeah.

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It's an interesting setup. I'm still using

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this setup today. Actually a good one

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Walls of text...

NOTE Monte Carlo

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Now the final theme I want to look into,

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which is the latest, is called Monte Carlo.

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...which you know, idea here is to

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bring the idea of picking a random

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theme to the next level.

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So this is just one theme that generates

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a random color palette for me everytime.

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Not in MELPA, because I'm not ...

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I'm not completely satisfied with it.

NOTE How to pick a random color palette

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But anyway... How do I... How do I pick

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a random color palette right?

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The answer is again to look at a different color space.

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This time it's called HLC, which is hue,

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lightness, and chroma. So hue is just

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colors, red, green, blue, or yellow, whatever.

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Lightness is lightness. Chroma is saturation,

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essentially. This is great because I could

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fix both lightness and saturation, and only

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vary in hue to pick my colors.

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Now the problem is

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once I have the color palette in

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HLC, how would I convert it to

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sRGB, because Emacs only knows

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about colors in sRGB.

NOTE XYZ

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The answer here is to go through

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another color space called XYZ.

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This is an extremely important color space,

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because basically all other color spaces are

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defined on top of XYZ.

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So you would have like transformations

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from XYZ to all other

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color spaces. Now if you invert this

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these transformations, you could go from,

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for example, HLC back into XYZ

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and then go to another color

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space of your choosing, right.

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So this is how to convert colors

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between color spaces. In this case,

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I have to convert colors from HLC

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to LAB, and from LAB to XYZ,

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and from XYZ to sRGB.

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So this time the conversions are

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all done in Emacs Lisp, and I

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have the code in here in this URL.

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You could take a look, or you

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could actually just use maybe some package

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to convert colors.

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Anyway let me show you how

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this works. So in this case I

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could apply theme, Monte Carlo.

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So this is now a random theme.

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Actually, well, a theme with random colors,

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because I could apply the same theme,

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and it will look different.

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Every time.

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I could also look at the colors it picked.

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as a list of colors.

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I could also look at this like

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fancy chart of colors. This is

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too small. So let me show you this.

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So basically the same thing.

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This is actually a cross-section in HLC space,

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and the colors it picked are these like

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white circles.

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So that's that.

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But like I said, I'm not

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fully satisfied, because most of time the

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colors are pretty boring from it.

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I could think of some

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ways to improve this. For example I

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could choose different patterns for the color

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samples. but I don't know of any

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good patterns. So I need to try

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things out. And then another way is

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probably to use different color spaces like the HSL, or HSV.

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Again I need to try this out.

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So yeah there are room for improvements.

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If you... If you have and idea,

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you know, let me know, and we

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can try it out.

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So that's the end of my talk.

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Hopefully you have some new ideas.

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Thanks for listening in, and yeah.

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Go create more themes because we can't have enough.

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Thanks!