hsluv VS aseprite

Here's a potential solution to having consistent accessible color palettes in Koala: https://www.hsluv.org

If you want to take a step further, take a look into perceptually uniform color spaces, like HSL(uv) or LCh(uv).

Maxima enabled me to make my color space [HSLuv](https://www.hsluv.org/). I encoded CIELUV <-> RGB transformation functions into Maxima, ran `solve` and converted the output back into code. It's great to be able to commit [Maxima code](https://github.com/hsluv/hsluv/tree/master/math) into your repository and not leave the math as an "exercise to the reader".

If you want to make it more useful than a browser's built-in color picker, perhaps support other color spaces? Maybe HSLuv or CIE L*a*b*?

Chroma could be included, but as a minor criterion. When I look at color pickers that try to balance human perception against geometric simplicity like HSLuv and Okhsl, chroma is the property that gets distorted the most. Perceptual brightness and hue seem to be more important.

> Now, HSL isn't necessarily the best color mode to use in every situation; it tends to produce gradients that can be overly bright and vivid, because it doesn't take into account human perception.

Shout-out to to [HSLUV](https://www.hsluv.org/) which does exactly that.

I'm a little bit of a color freak. Allow me to leave some suggestions :)

- Picking from the 256 color pallete will likely give you colors with different brightness. This may hurt readability of darker colors on a dark background, and may make some color stand out unintentionally. Consider using something like HSLuv [1] to pick colors with the same lightness, then convert to the closest Xterm color [2].

- To make it obvious there is a gradient, I'd pick one lightness (assuming HSLuv) and one saturation (I usually stick to 100%), then pick a distance in hue for each step. For example if I expect to see a maximum of 7 steps on the screen at once, one way is to start at 0, then 30, then 60, etc. You may choose to go over 180, but keep in mind 360 will be the same as 0 so maybe stop at 240. Note how by picking adjacent colors from the table you are still picking a distance, but the distance is too small so it's hard to see.

- You may want to choose a different starting point than 0, and maybe different direction for the steps, depending on whether you want the colors to "mean" anything. For example red is commonly associated with warning, so you can arrange to have the top of the range aligned with red. Or arrange to avoid the red region if you don't want that association.

[1] https://www.hsluv.org/

Check out HSLuv as an alternative for UI design: https://www.hsluv.org/

HSLuv is a HSL alternative, which aims to maintain the perceived lightness of colors across the hue spektrum. It also includes a HPLuv variant, which additionally maintains saturation, at the cost of color coverage. Both are very useful for procedually generating or modifying colors. More Info: https://www.hsluv.org/comparison/

Aseprite is free if you compile it yourself [0], and can still be used for commercial purposes if compiled this way [1]. But I recommend buying it anyway to support the project.

[0]: https://github.com/aseprite/aseprite/

[1]: https://www.aseprite.org/faq/#can-i-sell-graphics-created-wi...

Nitpick: Aseprite is source-available, not open source by the Open Source Initiative's definition. From the Aseprite EULA [1]:

> (g) Source code.

> You may only compile and modify the source code of the SOFTWARE PRODUCT for your own personal purpose or to propose a contribution to the SOFTWARE PRODUCT.

The OSI's definition of open source [2] requires distribution of unmodified and modified copies (with the exception of lone, unmodified copies; I read somewhere that writing a hello world program is a workaround):

> 1. Free Redistribution

> The license shall not restrict any party from selling or giving away the software as a component of an aggregate software distribution containing programs from several different sources. The license shall not require a royalty or other fee for such sale.

...

> 3. Derived Works

> The license must allow modifications and derived works, and must allow them to be distributed under the same terms as the license of the original software.

"free software" is ambiguous to English speakers/writers, but "open source" is ambiguous in its own way.

[1] https://github.com/aseprite/aseprite/blob/main/EULA.txt

[2] https://opensource.org/osd

That's not because you didn't know about it that it is a "new trend"

https://github.com/Poussinou/FLOSS-Games-on-Steam

https://store.steampowered.com/curator/38475471-Libre-Open-S...

It's nothing new, and also exist in the tooling side of things

https://store.steampowered.com/app/431730/Aseprite/ - https://github.com/aseprite/aseprite

This is specifically targeted for Aseperite users, and also makes use of a great tool called TexturePacker by CodeAndWeb. Andreas from CodeAndWeb always helps me out when I email them, and the software itself is awesome, so I figured I'd give it a boost.

Are you on macOS? There is a known issue that we've just fixed and released a new version with the fix today as v1.3-rc7 (we're going to publish some release notes in the following days).

I'd never used Aseprite before, but it was luckily pretty straightforward to copy and paste and slightly edit the knight into a little spritesheet!

I modeled this simple computer in Blender and used the Pribambase plugin to create an animated texture for it with aseprite. I keyframed the animation in Blender and it works perfectly there.

One of my favorite "MS Paint" clones is KolourPaint[1]. I've been using it for over a decade (you have to search around to get it on non-linux platforms but I presently have it on MacOS). One of my favorite features is how it handles transparency, where it's just treated like another "color".

If anyone is heavy into pixel art, you may also be interested in Aseprite[2].

[1] http://www.kolourpaint.org/

[2] https://www.aseprite.org/