Color Converter API

GET

Convert color codes across hex, RGB, CMYK, HSL, and named values.

Color Converter translates color values across hex, RGB, CMYK, and named inputs into standard RGB formats and channel breakdowns. Paid plans expand output to include CMYK, HSL, ANSI 16-color codes, and recognized English color names.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/colorconverter?hex=FF0000

Query parameters

hexstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "hex": "#FF0000",
    "rgb": "255, 0, 0",
    "hsl": "0, 100, 50",
    "cmyk": "0, 100, 100, 0",
    "ansi16": 91,
    "name": "red",
    "channels": {
      "rgbChannels": 3,
      "cmykChannels": 4,
      "ansiChannels": 1,
      "hexChannels": 1,
      "hslChannels": 3
    }
  }
}

About the Color Converter API

Color Converter works by analyzing the color provided and converting it to the specified format. It uses advanced algorithms to convert the color to the specified format and returns the color in the new format.

What people use it for

Design System Tokens: Frontend engineers convert designer-provided hex codes into RGB format to populate dynamic CSS variables across multi-theme web applications.
Print Production Prepress: Before sending digital graphics to commercial printers, prepress technicians convert RGB values into four-channel CMYK codes for accurate plate alignment.
Terminal Interface Styling: CLI developers map web color codes directly to ANSI 16-color numbers to colorize script output inside server terminal consoles.
Contrast Ratio Auditing: When evaluating accessibility compliance, automated testing suites convert color names into RGB numbers to calculate exact background and foreground luminance.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use Color Converter

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets

Questions.

Common questions about the Color Converter API.

Read the docs →

Which color formats can I convert between?

You can convert between hexadecimal, RGB, HSL, CMYK, and common English color names on every plan; ANSI 16-color codes require a paid plan. Dedicated endpoints accept inputs in hex, rgb, hsl, cmyk, or name format and return the converted values alongside channel counts.

Which plan fits 50,000 color conversions a month?

The Starter plan easily covers this volume. Each call uses 2 credits, so 50,000 conversions take 100,000 credits, exactly half of the 200,000 credits included on Starter. On that plan, usage works out to about $0.30 per 1,000 calls. The Free plan provides 100 calls per month.

Are CMYK, HSL, and color names available on the Free plan?

No. Fields like CMYK, HSL, ANSI 16 codes, color names, and hex outputs are marked premium depending on the endpoint used. Upgrading to any paid plan unlocks all converted format fields across every endpoint.

Do I need to include the hash mark when passing a hexadecimal color?

No, you must omit the hash prefix when passing a color to the hex endpoint. Pass the hex value directly, such as FF0000. The API response will return the converted hex string with the hash prefix included.

Will every color return a common English name?

No. The name field returns the common English name of the color only if an established match is available. Colors without a standard English name will not provide one.

Request parameters — GET /v1/colorconverter

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`hex`Required	string	`FF0000`	The color in hexadecimal format (e.g., FF0000). Make sure you ommit the #

Example request

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curl "https://api.apiverve.com/v1/colorconverter?hex=FF0000" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — GET /v1/colorconverter

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "hex": "#FF0000",
    "rgb": "255, 0, 0",
    "hsl": "0, 100, 50",
    "cmyk": "0, 100, 100, 0",
    "ansi16": 91,
    "name": "red",
    "channels": {
      "rgbChannels": 3,
      "cmykChannels": 4,
      "ansiChannels": 1,
      "hexChannels": 1,
      "hslChannels": 3
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`hex`	string	`"#FF0000"`	Color in hexadecimal format with hash prefix included
`rgb`	string	`"255, 0, 0"`	Color in red green blue comma-separated format
`hsl`Premium	string	`"0, 100, 50"`	Color in hue saturation lightness comma-separated format
`cmyk`Premium	string	`"0, 100, 100, 0"`	Color in cyan magenta yellow key comma-separated format
`ansi16`Premium	number	`91`	ANSI 16-color code representation of the color
`name`Premium	string	`"red"`	Common English name of the color if available
`channels`	object	`{...}`
`rgbChannels`	number	`3`	Number of RGB color channels always three
`cmykChannels`	number	`4`	Number of CMYK color channels always four
`ansiChannels`	number	`1`	Number of ANSI color channels always one
`hexChannels`	number	`1`	Number of hexadecimal color channels always one
`hslChannels`	number	`3`	Number of HSL color channels always three

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	Color Converter calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — GET /v1/colorconverter

No SDK to install — this is a plain HTTPS call to /v1/colorconverter with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/colorconverter" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/colorconverter-apiSource, issues and the examples this page is built from.ReferenceColor Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/colorconverternpm apiverve-colorconverterPyPI APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — GET /v1/colorconverter

Install the Node.js SDK, then call the Color Converter API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/colorconverter

Node.js

const res = await fetch("https://api.apiverve.com/v1/colorconverter", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/colorconverterThe published Node.js client, versioned and signed.GitHubapiverve/colorconverter-apiSource, issues and the examples this page is built from.ReferenceColor Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

apiverve-colorconverterPyPI APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — GET /v1/colorconverter

Install the Python SDK, then call the Color Converter API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-colorconverter

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/colorconverter",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

PyPIapiverve-colorconverterThe published Python client, versioned and signed.GitHubapiverve/colorconverter-apiSource, issues and the examples this page is built from.ReferenceColor Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/colorconverternpm APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — GET /v1/colorconverter

Install the C# / .NET SDK, then call the Color Converter API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.ColorConverter

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/colorconverter");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.ColorConverterThe published C# / .NET client, versioned and signed.GitHubapiverve/colorconverter-apiSource, issues and the examples this page is built from.ReferenceColor Converter API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/colorconverternpm apiverve-colorconverterPyPI

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — GET /v1/colorconverter

No SDK to install — this is a plain HTTPS call to /v1/colorconverter with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/colorconverter", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/colorconverternpm apiverve-colorconverterPyPI APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — GET /v1/colorconverter

No SDK to install — this is a plain HTTPS call to /v1/colorconverter with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/colorconverter");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/colorconverternpm apiverve-colorconverterPyPI APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — GET /v1/colorconverter

No SDK to install — this is a plain HTTPS call to /v1/colorconverter with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/colorconverter")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/colorconverternpm apiverve-colorconverterPyPI APIVerve.API.ColorConverterNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

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Color Converter API

Try it — live request, no key required

About the Color Converter API

What people use it for

Ways to call it

Other ways to use Color Converter

Questions.

Request parameters — GET /v1/colorconverter

Required

Authentication

Response — GET /v1/colorconverter

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — GET /v1/colorconverter

Resources

Also published for

Call it from Node.js — GET /v1/colorconverter

Resources

Also published for

Call it from Python — GET /v1/colorconverter

Resources

Also published for

Call it from C# / .NET — GET /v1/colorconverter

Resources

Also published for

Call it from Go — GET /v1/colorconverter

Resources

Also published for

Call it from PHP — GET /v1/colorconverter

Resources

Also published for

Call it from Ruby — GET /v1/colorconverter

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Color Converter API

Data Conversion

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