Check WCAG color contrast
Check WCAG color contrast: ratio and AA / AAA pass or fail for normal text, large text and UI components (utilpeek, Tanod). Use when an agent must check whether text and background colors meet WCAG AA or AAA contrast.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
351 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://tanod.dev/v1/color/contrast
| Category | Everything else |
|---|---|
| Provider host | tanod.dev |
| Networks | eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.001 | 351 ms |
Example input (from the provider)
{
"body": {
"background": "white",
"foreground": "#777"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"background": {
"description": "The background color it sits on, in the same CSS color formats.",
"maxLength": 64,
"minLength": 1,
"type": "string"
},
"foreground": {
"description": "The text or UI color, a CSS color: hex (#rgb, #rrggbb, #rrggbbaa), rgb() / rgba(), hsl() / hsla() or a CSS color name.",
"maxLength": 64,
"minLength": 1,
"type": "string"
}
},
"required": [
"foreground",
"background"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"background": {
"type": "string"
},
"composited": {
"type": "boolean"
},
"foreground": {
"type": "string"
},
"large_text": {
"properties": {
"aa": {
"type": "boolean"
},
"aaa": {
"type": "boolean"
}
},
"type": "object"
},
"normal_text": {
"properties": {
"aa": {
"type": "boolean"
},
"aaa": {
"type": "boolean"
}
},
"type": "object"
},
"note": {
"type": "string"
},
"ratio": {
"type": "number"
},
"ratio_text": {
"type": "string"
},
"ratio_unrounded": {
"type": "number"
},
"ui_components": {
"properties": {
"aa": {
"type": "boolean"
}
},
"type": "object"
}
},
"required": [
"ratio",
"normal_text",
"large_text",
"ui_components"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}