Extract color palettes from images, websites, or designs. Identifies dominant colors, generates complementary schemes, and exports in multiple formats (HEX, RGB, HSL, Tailwind, CSS variables).
NewMaintained
Automatic
◆Design & UX Review pack
Last verified 8/24/2026
What it changes
Passed 20 of 22 test cases with the skill, and 20 of 22 without it.
Without skill91%
With skill91%
0 fixed20 passed either way2 still failing0 broke
Pass-rate lift
0 pp
Tokens
+21%
Agent turns
0%
Response time
-3%
Model gemini-3.6-flashMeasured 8/24/2026v120 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
What's inside
The instructions your model reads when the skill loads.
SKILL.md39 lines4 files
Color Palette Extractor
Extract and generate accessible color palettes from images, websites, and designs.
Contents
references/output-template.md — full report structure for presenting a palette
references/color-theory.md — harmony schemes, accessibility, extraction best practices
Workflow
Identify the source: image file (PNG, JPG, SVG), website URL, screenshot, design mockup, or an existing color code to build from.
Extract colors.
From an image: analyze pixel data, identify dominant colors, group similar shades, calculate frequency, and sort by prominence.
From a website: fetch and parse the CSS, extract color values, and identify brand, accent, text, and background colors.
Cluster with K-means; extract 5-10 dominant colors. Ignore near-white and near-black unless significant.
Build the primary palette (5-10 colors): most dominant color, 2-3 supporting colors, 1-2 accents, a background, and a text color. Generate an extended palette with tints, shades, tones, and 50-950 numeric scales. See references/color-theory.md.
Run color harmony analysis to produce complementary, analogous, triadic, split-complementary, tetradic, and monochromatic schemes. See references/color-theory.md.
Check accessibility: compute WCAG 2.1 contrast ratios for each text/background pairing and test against protanopia, deuteranopia, and tritanopia. Recommend accessible alternatives where a pairing fails. See references/color-theory.md.
Format the report following references/output-template.md, and export to the requested formats using references/export-formats.md.
Output Requirements
Deliver palettes that have clear dominant colors, sufficient variations, semantic naming, harmony schemes, contrast ratios that pass accessibility checks, usage guidelines, and exports in multiple formats. Produce professional, accessible palettes ready for immediate use in design systems.