This is a project I’ve thought about for a while. For years I have made color charts using Adobe Illustrator. They have been invaluable but a time sink. Recently I asked ChatGPT to see if it can solve the problem. After about 10 hours of back and forth it getting very very close. Here’s what cat gap says for itself.

A visual teaching tool for studying color and value

  1. Uses selected primaries to build a 12-color spectrum palette

  2. Reveals how different colors shift differently with white and black

  3. Shows that all colors still hold a readable value

  4. Reinforces the idea that value is often as important as color in oil painting

  5. Turns color theory into something practical, visible, and easier to teach

  6. We’ll whip ups some tight instructions soon.

Primary Palette Mixer

Primary Palette Mixer

All colour mixed from three primaries. White and black are value modifiers only. Value is the most important quality of colour.

Primaries
Presets
Paint-like mixing
85%
Value table
Actions

Value Scale

Each column shows a palette colour across 7 value levels — tinted with white above, shaded with black below. The ring marks its natural value. K is the neutral grey reference.
 natural (full intensity) value  ·  row 1 = lightest  ·  row 7 = darkest

Green test — Yellow mixed with Blue

Subtractive mixing should produce a believable green at the midpoint. This is a quick sanity check for your primaries.
Yellow
50/50  —
Blue

Palettes — all colour from three primaries

A = full intensity from your chosen R/Y/B.   B primaries = mix of A's adjacent tertiaries around each primary.   C primaries = mix of A's Violet, Orange and Green.

A — Full Intensity

B — Semi Neutral

C — Neutral