Bug 393477

Summary: Add color mode type - RYB color wheel
Product: [Applications] krita Reporter: Jo <jo.y.venn>
Component: Color modelsAssignee: Krita Bugs <krita-bugs-null>
Status: REPORTED ---    
Severity: wishlist CC: andrew.crouthamel, dconner.pro, halla, scottpetrovic
Priority: NOR Keywords: triaged
Version First Reported In: 4.0.1   
Target Milestone: ---   
Platform: macOS (DMG)   
OS: macOS   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: Simple color wheel

Description Jo 2018-04-24 20:12:31 UTC
Could you add the RYB color mode type as an optional wheel, please?
Example. 
https://en.m.wikipedia.org/wiki/RYB_color_model
Comment 1 Scott Petrovic 2018-04-27 13:41:37 UTC
You would have to explain more with you that would work as a wheel. 

I am not sure if you are just wanting color swatches or a color wheel that has all available colors. Why would something like this not work?  https://i.imgur.com/mQpf8EL.png
Comment 2 Jo 2018-04-29 14:43:12 UTC
As illustrator and designer I find color modes like: HSY', HSI, HSL as math games because traditional media doesn't use Rgb. It's far more realistic to paint with the RYB model.
Comment 3 Scott Petrovic 2018-04-30 00:56:52 UTC
What does an RYB color picking model look like. How would you select black, how would you pick grey?
Comment 4 Jo 2018-05-14 17:07:12 UTC
Created attachment 112649 [details]
Simple color wheel

The artistic color wheel does what I want just the available colors are limited and pure, you can't mix them. A simple color wheel which helps me to pick color harmonies (triad, split complementary, tetriatic,.. Ect) would be useful. I discussed this already in bug 373922
https://bugs.kde.org/show_bug.cgi?id=373922
Comment 5 Andrew Crouthamel 2018-09-28 03:21:51 UTC
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed.

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Comment 6 Jo 2018-09-30 08:03:16 UTC
I added this report because artists need useful color support no math games. I submitted examples in my latest comment, please check it out.
Comment 7 Scott Petrovic 2018-09-30 17:47:57 UTC
@Jo - Can you explain how this request is different from this.

https://bugs.kde.org/show_bug.cgi?id=373922

This seems to be exactly how the artistic color selector works with what you are describing...That bug listed above is adding color gamuts for limiting the colors. The screenshots you attach can give you exactly what that looks like.
Comment 8 Jo 2018-09-30 18:07:27 UTC
(In reply to Scott Petrovic from comment #7)
> @Jo - Can you explain how this request is different from this.
> 
> https://bugs.kde.org/show_bug.cgi?id=373922

In fact, it's the same concept. It seems I'm struggling with it else things wouldn't come up again and again. 
OK I submitted images from the web, next time I create my own mockup, I don't like a limited color wheel but a selective way to pick up harmonizing colors.
Comment 9 Andrew Crouthamel 2018-10-01 02:22:09 UTC
Changing to Reported status.
Comment 10 David Conner 2020-11-12 01:02:18 UTC
I'm unfamiliar with the RYB colormode, but I think the difference b/w existing color modes and what Jo is describing is in how the colors present themselves to artists. This is a bit difficult because it is unlike how most graphics apps handle colors.

Off the top of my head, I can think of a few ways to do this, but none of them can be like true pigment mixing, which I've thought about a bit. I don't want to speak too soon (without more digging into RYB), but briefly... 

One option would be an approach using various blending modes in brush strokes, but that's either too complicated to think about as an artist or too deeply integrated in the software to implement. 

Another option would be an RYB color mode in the "Artistic Color Selector", but would function a bit differently than the other color modes (it would need to be limited to the Docker). 

Anyways, I googled real quick and I found this paper which should elaborate more.

Computational RYB Color Model and its Applications

https://www.jstage.jst.go.jp/article/tievciieej/5/2/5_110/_article/-char/ja/
Comment 11 David Conner 2020-11-12 01:04:43 UTC
and btw Jo, the Gamut Color Masks made a strong impression on me when I first discovered it. I wasn't really expecting it, but it really helped me think about color theory.
Comment 12 Jo 2020-11-13 14:30:47 UTC
@David Conner

Thanks for your well meant suggestions. 
I've learnt and practice art, so I don't imagine other-worldy things, at least not if we talk of color theory.
I made my own gamut masks and were the first one to push in this direction. Nobody cares about color harmony. 
But I deviate, the scope of RYB is to have colors in a certain sequence. Gamut masks are a "layer" on top.
Comment 13 Tiar 2020-12-11 01:18:52 UTC
*** Bug 422754 has been marked as a duplicate of this bug. ***