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ContrastKit

by dev.workers.mike-tusa.contrastkit
OverviewDiscussionsAdmin

Server Details

WCAG color contrast checks, nearest accessible color, CSS color conversion and palette pair checks.

Ownership verified
Status
Healthy
Uptime
100.0% over the last 24 hours
Last Tested
Transport
Streamable HTTP · MCP 2025-11-25
URL
ChatGPT
–
Claude
–

TDQS

A4.1/5.0

Scored across 4 tools

Disambiguation5/5

Each tool targets a clearly distinct operation: single-pair check, all-pairs palette check, color format conversion, and remediation suggestion. The boundary between check_contrast (one pair) and check_palette (many pairs) is well-delineated by their descriptions.

Naming Consistency5/5

All four names follow a consistent verb_noun pattern: check_contrast, check_palette, convert_color, suggest_accessible_color. No style mixing or vague verbs.

Tool Count5/5

Four tools is well-scoped for a contrast-utility server; each maps to a distinct task (check, batch-check, convert, suggest) with no filler or redundancy.

Completeness4/5

The surface covers the core lifecycle: check a pair, check a palette, convert formats, and remediate failures. Minor gaps exist around batch/HTML-text parsing or color-blindness simulation, but agents can work around these.

Available Tools

4 tools
check_contrastCheck WCAG color contrastA
Read-onlyIdempotent
Inspect

Compute the WCAG 2.x contrast ratio between a text (foreground) color and a background color, with pass/fail for AA, AA large text, AAA, AAA large text and non-text UI (3:1). Handles translucent colors. Read-only. Same engine as GET /api/contrast.

Inputs: background (required), foreground (required). Returns: pass, notes, ratio, version, +5 more

check_paletteCheck every pair in a paletteA
Read-onlyIdempotent
Inspect

Contrast ratio for every pair of 2 to 12 colors (up to 66 pairs), highest first, each flagged against the chosen WCAG level. Use it to see which brand colors can be used together for text. Read-only. Same engine as GET /api/palette.

Inputs: colors (required), level. Returns: count, level, notes, pairs, +4 more

convert_colorConvert a CSS colorA
Read-onlyIdempotent
Inspect

Convert a CSS color to hex, rgb() and hsl(), with its relative luminance, its contrast on white and on black, and the better text color (black or white) to put on it. Read-only. Same engine as GET /api/convert.

Inputs: color (required). Returns: hex, hsl, rgb, alpha, +6 more

suggest_accessible_colorSuggest the nearest accessible colorA
Read-onlyIdempotent
Inspect

For a failing color pair, find the closest color (same hue and saturation, lightness changed as little as possible) that meets the chosen WCAG level. Adjust the foreground (default), the background, or both (best first). Read-only. Same engine as GET /api/suggest.

Inputs: background (required), foreground (required), level, adjust. Returns: pass, level, notes, ratio, +10 more

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

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