PickShade MCP server
Give Claude, Cursor, VS Code and other AI assistants real color tools: exact conversions, WCAG and APCA contrast, palettes, 50–950 scales, color blindness checks and ready design tokens. One URL, nothing to install.
Server URL
https://pickshade.com/api/mcpConnect your assistant
Run in a terminal.
Claude Code
claude mcp add --transport http pickshade https://pickshade.com/api/mcpSettings → Connectors → Add custom connector, then paste the URL.
Claude and Claude Desktop
https://pickshade.com/api/mcpAdd to .cursor/mcp.json.
Cursor
{
"mcpServers": {
"pickshade": {
"url": "https://pickshade.com/api/mcp"
}
}
}Add to .vscode/mcp.json.
VS Code
{
"servers": {
"pickshade": {
"type": "http",
"url": "https://pickshade.com/api/mcp"
}
}
}Things to ask
- Is #6b7280 readable on white? Fix it if not.
- Build a shadcn theme from #6d4aff.
- Give me a 5-color analogous palette around navy and export it as Tailwind v4.
- Can people with deuteranopia tell #e11d48 and #16a34a apart?
- What is the closest Tailwind class to oklch(62% 0.21 260)?
Tools
parse_colorRead any color and describe it: HEX, RGB, HSL and OKLCH values, the closest human name, the closest Tailwind class, its hue family, whether it fits sRGB and Display P3, and which text color, white or black, reads better on it.
convert_colorConvert a color between formats: hex, rgb, hsl, hsv, hwb, cmyk, lab, lch, oklab, oklch, display-p3, rec2020, xyz and platform code (swiftui, uikit, flutter, android). Values follow CSS Color 4.
check_contrastCheck text contrast against a background with both WCAG 2 (ratio, AA and AAA for normal and large text) and APCA (Lc value and the usage level it allows). Also suggests the nearest text color that passes AA and AAA while keeping its hue.
check_gamutCheck whether a color fits the sRGB, Display P3 and Rec. 2020 gamuts, and get the closest sRGB fallback that keeps lightness and hue (CSS Color 4 gamut mapping in OKLCH).
nearest_namesFind the closest named colors, CSS color keywords and Tailwind CSS classes for a color, ranked by perceptual distance (deltaE OK).
compare_colorsCompare two colors: CIEDE2000 and deltaE OK difference with a plain verdict (identical, nearly, similar, different, opposite), lightness shift in percent, chroma and hue shift, and the contrast between them.
generate_scaleBuild an 11-step tint and shade scale (50, 100 … 900, 950) from one color in OKLCH, the same shape as Tailwind palettes, with even perceived lightness steps.
harmoniesGet color harmonies for a base color, computed in OKLCH so lightness stays even: complementary, split-complementary, analogous, triadic, tetradic, square and monochromatic.
mix_colorsMix two colors at a ratio in a chosen color space, like CSS color-mix(). OKLab keeps the middle bright, sRGB tends to turn gray. Returns the result and a ready color-mix() expression.
generate_paletteGenerate a harmonious palette in OKLCH. Keep colors you already have, pick a style (auto, analogous, complementary, triadic, monochromatic, pastel, vivid, muted, dark) and pass a seed to get the same palette every time.
simulate_cvdShow how colors look with protanopia, deuteranopia, tritanopia and achromatopsia (Machado 2009 at full severity), and list the pairs that become hard to tell apart.
export_tokensTurn a list of colors into ready code: CSS custom properties, a Tailwind v4 @theme block, SCSS variables, JSON, W3C design tokens (DTCG), a JavaScript array or an SVG swatch strip. Unnamed colors get their closest color name.
build_systemBuild a full color system from a brand color: 50–950 scales for primary, secondary, accent, neutral and status colors, light and dark theme roles, exported as a Tailwind v4 theme, CSS variables, shadcn/ui globals.css or DTCG tokens, with a contrast audit of text and surface pairs.
Questions and answers
What is an MCP server?
MCP, the Model Context Protocol, lets AI assistants call external tools. With this server connected, your assistant computes colors with exact formulas instead of guessing.
Is it free and private?
Yes. It is free, needs no account, and every call is computed on the fly. Colors you send are not stored.
Which transport does it use?
Streamable HTTP in stateless mode, supported by current MCP clients. Every tool is read-only and deterministic, except generate_palette without a seed.