Text & Data🌐 YAS server-sideAPI availableintermediate

Color Converter

Converts colors between HEX, RGB, HSL, CMYK and shows WCAG contrast ratios.

Processed by YAS · not stored

Ready to runInstant execution

Result

—

What does this tool do?

Converts colors between HEX, RGB, HSL, CMYK and shows WCAG contrast ratios.

Why would I use it?

You need a color in a different format for code.
You are checking text/background contrast for accessibility.
You want to lighten/darken a color.

Real-life example

Input

#6366f1

Output

rgb(99,102,241) · hsl(239,84%,67%) · contrast vs #fff: 5.1:1

Every format is shown simultaneously.

Input → Process → Output → Next

Input: Enter a color in any supported format.
Process: YAS converts between models and computes contrast.
Output: All formats plus contrast ratios.
Next action: Choose combinations that pass WCAG AA (≥4.5:1 for text).

Common mistakes

Using contrast calculators on colors with alpha.
Assuming RGB and sRGB values are interchangeable.
Ignoring color blindness when pairing colors.

What the result means

Contrast ratio measures readability between two colors.

Privacy & security

Your input is sent to YAS infrastructure because the tool requires server-side processing or public network queries. Input is not stored.

API

Endpoint

POST https://yas.sh/api/v1/tools/color-converter

Request Header

Content-Type: application/json

cURL

curl -X POST "https://yas.sh/api/v1/tools/color-converter" \
  -H "Content-Type: application/json" \
  -d '{"input":"#6366f1"}'

JavaScript

const res = await fetch("https://yas.sh/api/v1/tools/color-converter", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
  "input": "#6366f1"
}),
});
const data = await res.json();

Python

import requests

r = requests.post("https://yas.sh/api/v1/tools/color-converter", json={"input":"#6366f1"})
data = r.json()

Field	Type	Required	Description
input	string	Yes	#hex, rgb(), hsl(), or basic color name

Success response

{ "result": { "hex": "#6366f1", "rgb": "rgb(99, 102, 241)", "hsl": "hsl(239, 84%, 67%)", "contrastWhite": 4.87, "bestText": "white" } }

Convert a color to HEX / RGB / HSL / CMYK / HSV + WCAG contrast ratios.

Error responses

400 VALIDATION_ERROR — invalid input or unsupported option.
413 PAYLOAD_TOO_LARGE — input exceeds the 64 KB limit.
429 RATE_LIMIT_EXCEEDED — rate limit exceeded (60 req/min).

Limits

Maximum input: 64 KB per request.
Rate limit: 60 requests/min per IP address.
Authenticated accounts benefit from higher tier quotas.

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String Length