Color Brightness Calculator API

Overview

To use Color Brightness Calculator, you need an API key. You can get one by creating a free account and visiting your dashboard.

GET Endpoint

https://api.apiverve.com/v1/colorbrightness

Example

How to call the Color Brightness Calculator API in different programming languages.

curl -X GET \
  "https://api.apiverve.com/v1/colorbrightness?hex=FF5733" \
  -H "X-API-Key: your_api_key_here"

const response = await fetch('https://api.apiverve.com/v1/colorbrightness?hex=FF5733', {
  method: 'GET',
  headers: {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const data = await response.json();
console.log(data);

import requests

headers = {
    'X-API-Key': 'your_api_key_here',
    'Content-Type': 'application/json'
}

response = requests.get('https://api.apiverve.com/v1/colorbrightness?hex=FF5733', headers=headers)

data = response.json()
print(data)

package main

import (
    "fmt"
    "io"
    "net/http"

)

func main() {
    req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/colorbrightness?hex=FF5733", nil)

    req.Header.Set("X-API-Key", "your_api_key_here")
    req.Header.Set("Content-Type", "application/json")

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        panic(err)
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)
    fmt.Println(string(body))
}

{
  "status": "ok",
  "error": null,
  "data": {
    "hex": "#FF5733",
    "rgb": {
      "r": 255,
      "g": 87,
      "b": 51
    },
    "luminance": 0.2832,
    "perceived_brightness": 131,
    "yiq": 133.13,
    "is_light": false,
    "is_dark": true,
    "brightness_category": "dark",
    "recommended_text_color": "#FFFFFF",
    "contrast_ratio_with_white": 3.15,
    "contrast_ratio_with_black": 6.66,
    "wcag_aa_compliant_with_white": false,
    "wcag_aa_compliant_with_black": true,
    "wcag_aaa_compliant_with_white": false,
    "wcag_aaa_compliant_with_black": false
  }
}

Authentication

The Color Brightness Calculator API requires authentication via API key. Include your API key in the request header:

X-API-Key: your_api_key_here

Learn more about authentication →

Interactive API Playground

Test the Color Brightness Calculator API directly in your browser with live requests and responses.

Parameters

The following parameters are available for the Color Brightness Calculator API:

Response

The Color Brightness Calculator API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.

Other Response Formats

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
  <data>
    <hex>#FF5733</hex>
    <rgb>
      <r>255</r>
      <g>87</g>
      <b>51</b>
    </rgb>
    <luminance>0.2832</luminance>
    <perceived_brightness>131</perceived_brightness>
    <yiq>133.13</yiq>
    <is_light>false</is_light>
    <is_dark>true</is_dark>
    <brightness_category>dark</brightness_category>
    <recommended_text_color>#FFFFFF</recommended_text_color>
    <contrast_ratio_with_white>3.15</contrast_ratio_with_white>
    <contrast_ratio_with_black>6.66</contrast_ratio_with_black>
    <wcag_aa_compliant_with_white>false</wcag_aa_compliant_with_white>
    <wcag_aa_compliant_with_black>true</wcag_aa_compliant_with_black>
    <wcag_aaa_compliant_with_white>false</wcag_aaa_compliant_with_white>
    <wcag_aaa_compliant_with_black>false</wcag_aaa_compliant_with_black>
  </data>
</response>

status: ok
error: null
data:
  hex: '#FF5733'
  rgb:
    r: 255
    g: 87
    b: 51
  luminance: 0.2832
  perceived_brightness: 131
  yiq: 133.13
  is_light: false
  is_dark: true
  brightness_category: dark
  recommended_text_color: '#FFFFFF'
  contrast_ratio_with_white: 3.15
  contrast_ratio_with_black: 6.66
  wcag_aa_compliant_with_white: false
  wcag_aa_compliant_with_black: true
  wcag_aaa_compliant_with_white: false
  wcag_aaa_compliant_with_black: false

Response Structure

All API responses follow a consistent structure with the following fields:

Learn more about response formats →

Response Data Fields

When the request is successful, the data object contains the following fields:

Headers

Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →

GraphQL AccessALPHA

Access Color Brightness Calculator through GraphQL to combine it with other API calls in a single request. Query only the color brightness calculator data you need with precise field selection, and orchestrate complex data fetching workflows.

Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.

POST https://api.apiverve.com/v1/graphql

query {
  colorbrightness(
    input: {
      hex: "FF5733"
    }
  ) {
    hex
    rgb {
      r
      g
      b
    }
    luminance
    perceived_brightness
    yiq
    is_light
    is_dark
    brightness_category
    recommended_text_color
    contrast_ratio_with_white
    contrast_ratio_with_black
    wcag_aa_compliant_with_white
    wcag_aa_compliant_with_black
    wcag_aaa_compliant_with_white
    wcag_aaa_compliant_with_black
  }
}

Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.

CORS Support

The Color Brightness Calculator API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →

Rate Limiting

Color Brightness Calculator requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →

Error Codes

The Color Brightness Calculator API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →

SDKs for Color Brightness Calculator

Official Color Brightness Calculator packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →

JitPack

No-Code Integrations

Color Brightness Calculator works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →

Zapier

Make

Pipedream

n8n

Power Automate

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