Color Similarity Calculator API
Color Similarity Calculator is a tool for calculating similarity between two colors. It uses multiple algorithms including RGB distance, HSL comparison, and Delta E to provide comprehensive color similarity analysis.
The Color Similarity Calculator API provides reliable and fast access to color similarity calculator data through a simple REST interface. Built for developers who need consistent, high-quality results with minimal setup time.
To use Color Similarity 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/colorsimilarityCode Examples
Here are examples of how to call the Color Similarity Calculator API in different programming languages:
curl -X GET \
"https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47" \
-H "X-API-Key: your_api_key_here"const response = await fetch('https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47', {
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/colorsimilarity?color1=FF5733&color2=FF6B47', headers=headers)
data = response.json()
print(data)const https = require('https');
const url = require('url');
const options = {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
};
const req = https.request('https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47', options, (res) => {
let data = '';
res.on('data', (chunk) => data += chunk);
res.on('end', () => console.log(JSON.parse(data)));
});
req.end();<?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($ch, CURLOPT_HTTPHEADER, [
'X-API-Key: your_api_key_here',
'Content-Type: application/json'
]);
$response = curl_exec($ch);
curl_close($ch);
$data = json_decode($response, true);
print_r($data);
?>package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47", 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))
}require 'net/http'
require 'json'
uri = URI('https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47')
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Get.new(uri)
request['X-API-Key'] = 'your_api_key_here'
request['Content-Type'] = 'application/json'
response = http.request(request)
puts JSON.pretty_generate(JSON.parse(response.body))using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
using var client = new HttpClient();
client.DefaultRequestHeaders.Add("X-API-Key", "your_api_key_here");
var response = await client.GetAsync("https://api.apiverve.com/v1/colorsimilarity?color1=FF5733&color2=FF6B47");
response.EnsureSuccessStatusCode();
var responseBody = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseBody);
}
}Authentication
The Color Similarity Calculator API requires authentication via API key. Include your API key in the request header:
X-API-Key: your_api_key_hereInteractive API Playground
Test the Color Similarity Calculator API directly in your browser with live requests and responses.
Parameters
The following parameters are available for the Color Similarity Calculator API:
Calculate Color Similarity
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
color1 | string | required | First hex color value (with or without # prefix) Format: hexColor (e.g., FF5733) | - | |
color2 | string | required | Second hex color value (with or without # prefix) Format: hexColor (e.g., FF6B47) | - |
Response
The Color Similarity Calculator API returns responses in JSON, XML, YAML, and CSV formats:
Example Responses
{
"status": "ok",
"error": null,
"data": {
"color1": {
"hex": "#FF5733",
"rgb": {
"r": 255,
"g": 87,
"b": 51
},
"hsl": {
"h": 10.6,
"s": 100,
"l": 60
}
},
"color2": {
"hex": "#FF6B47",
"rgb": {
"r": 255,
"g": 107,
"b": 71
},
"hsl": {
"h": 11.7,
"s": 100,
"l": 63.9
}
},
"rgb_distance": 28.28,
"rgb_similarity": 93.6,
"hsl_similarity": 97.71,
"overall_similarity": 95.65,
"delta_e": 28.28,
"hue_difference": 1.15,
"saturation_difference": 0,
"lightness_difference": 3.92,
"similarity_category": "nearly identical",
"are_identical": false
}
}<?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>
<color1>
<hex>#FF5733</hex>
<rgb>
<r>255</r>
<g>87</g>
<b>51</b>
</rgb>
<hsl>
<h>10.6</h>
<s>100</s>
<l>60</l>
</hsl>
</color1>
<color2>
<hex>#FF6B47</hex>
<rgb>
<r>255</r>
<g>107</g>
<b>71</b>
</rgb>
<hsl>
<h>11.7</h>
<s>100</s>
<l>63.9</l>
</hsl>
</color2>
<rgb_distance>28.28</rgb_distance>
<rgb_similarity>93.6</rgb_similarity>
<hsl_similarity>97.71</hsl_similarity>
<overall_similarity>95.65</overall_similarity>
<delta_e>28.28</delta_e>
<hue_difference>1.15</hue_difference>
<saturation_difference>0</saturation_difference>
<lightness_difference>3.92</lightness_difference>
<similarity_category>nearly identical</similarity_category>
<are_identical>false</are_identical>
</data>
</response>
status: ok
error: null
data:
color1:
hex: '#FF5733'
rgb:
r: 255
g: 87
b: 51
hsl:
h: 10.6
s: 100
l: 60
color2:
hex: '#FF6B47'
rgb:
r: 255
g: 107
b: 71
hsl:
h: 11.7
s: 100
l: 63.9
rgb_distance: 28.28
rgb_similarity: 93.6
hsl_similarity: 97.71
overall_similarity: 95.65
delta_e: 28.28
hue_difference: 1.15
saturation_difference: 0
lightness_difference: 3.92
similarity_category: nearly identical
are_identical: false
| key | value |
|---|---|
| color1 | {hex:#FF5733,rgb:{r:255,g:87,b:51},hsl:{h:10.6,s:100,l:60}} |
| color2 | {hex:#FF6B47,rgb:{r:255,g:107,b:71},hsl:{h:11.7,s:100,l:63.9}} |
| rgb_distance | 28.28 |
| rgb_similarity | 93.6 |
| hsl_similarity | 97.71 |
| overall_similarity | 95.65 |
| delta_e | 28.28 |
| hue_difference | 1.15 |
| saturation_difference | 0 |
| lightness_difference | 3.92 |
| similarity_category | nearly identical |
| are_identical | false |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value | Description |
|---|---|---|---|
color1 | object | - | |
â”” hex | string | First color in hexadecimal format representation | |
â”” rgb | object | - | |
â”” r | number | Red channel value for first color | |
â”” g | number | Green channel value for first color | |
â”” b | number | Blue channel value for first color | |
â”” hsl | object | - | |
â”” h | number | Hue value for first color in degrees | |
â”” s | number | Saturation percentage for first color | |
â”” l | number | Lightness percentage for first color | |
color2 | object | - | |
â”” hex | string | Second color in hexadecimal format representation | |
â”” rgb | object | - | |
â”” r | number | Red channel value for second color | |
â”” g | number | Green channel value for second color | |
â”” b | number | Blue channel value for second color | |
â”” hsl | object | - | |
â”” h | number | Hue value for second color in degrees | |
â”” s | number | Saturation percentage for second color | |
â”” l | number | Lightness percentage for second color |
Headers
Required and optional headers for Color Similarity Calculator API requests:
| Header Name | Required | Example Value | Description |
|---|---|---|---|
X-API-Key | required | your_api_key_here | Your APIVerve API key. Found in your dashboard under API Keys. |
Accept | optional | application/json | Specify response format: application/json (default), application/xml, or application/yaml |
User-Agent | optional | MyApp/1.0 | Identifies your application for analytics and debugging purposes |
X-Request-ID | optional | req_123456789 | Custom request identifier for tracking and debugging requests |
Cache-Control | optional | no-cache | Control caching behavior for the request and response |
GraphQL AccessALPHA
Access Color Similarity Calculator through GraphQL to combine it with other API calls in a single request. Query only the color similarity 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/graphqlquery {
colorsimilarity(
input: {
color1: "FF5733"
color2: "FF6B47"
}
) {
color1 {
hex
rgb {
r
g
b
}
hsl {
h
s
l
}
}
color2 {
hex
rgb {
r
g
b
}
hsl {
h
s
l
}
}
rgb_distance
rgb_similarity
hsl_similarity
overall_similarity
delta_e
hue_difference
saturation_difference
lightness_difference
similarity_category
are_identical
}
}Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.
CORS Support
The Color Similarity Calculator API supports Cross-Origin Resource Sharing (CORS) with wildcard configuration, allowing you to call Color Similarity Calculator directly from browser-based applications without proxy servers.
| CORS Header | Value | Description |
|---|---|---|
Access-Control-Allow-Origin | * | Accepts requests from any origin |
Access-Control-Allow-Methods | * | Accepts any HTTP method |
Access-Control-Allow-Headers | * | Accepts any request headers |
Browser Usage: You can call Color Similarity Calculator directly from JavaScript running in the browser without encountering CORS errors. No proxy server or additional configuration needed.
Rate Limiting
Color Similarity Calculator API requests are subject to rate limiting based on your subscription plan. These limits ensure fair usage and maintain service quality for all Color Similarity Calculator users.
| Plan | Rate Limit | Description |
|---|---|---|
| Free | 5 requests/min | Hard rate limit enforced - exceeding will return 429 errors |
| Starter | No Limit | Production ready - standard traffic priority |
| Pro | No Limit | Production ready - preferred traffic priority |
| Mega | No Limit | Production ready - highest traffic priority |
Learn more about rate limiting →
Rate Limit Headers
When rate limits apply, each Color Similarity Calculator response includes headers to help you track your usage:
| Header | Description |
|---|---|
X-RateLimit-Limit | Maximum number of requests allowed per time window |
X-RateLimit-Remaining | Number of requests remaining in the current window |
X-RateLimit-Reset | Unix timestamp when the rate limit window resets |
Handling Rate Limits
Free Plan: When you exceed your rate limit, Color Similarity Calculator returns a 429 Too Many Requests status code. Your application should implement appropriate backoff logic to handle this gracefully.
Paid Plans: No rate limiting or throttling applied. All paid plans (Starter, Pro, Mega) are production-ready.
Best Practices for Color Similarity Calculator:
- Monitor the rate limit headers to track your Color Similarity Calculator usage (Free plan only)
- Cache color similarity calculator responses where appropriate to reduce API calls
- Upgrade to Pro or Mega for guaranteed no-throttle Color Similarity Calculator performance
Note: Color Similarity Calculator rate limits are separate from credit consumption. You may have credits remaining but still hit rate limits when using Color Similarity Calculator on Free tier.
Error Codes
The Color Similarity Calculator API uses standard HTTP status codes to indicate success or failure:
| Code | Message | Description | Solution |
|---|---|---|---|
200 | OK | Request successful, data returned | No action needed - request was successful |
400 | Bad Request | Invalid request parameters or malformed request | Check required parameters and ensure values match expected formats |
401 | Unauthorized | Missing or invalid API key | Include x-api-key header with valid API key from dashboard |
403 | Forbidden | API key lacks permission or insufficient credits | Check credit balance in dashboard or upgrade plan |
429 | Too Many Requests | Rate limit exceeded (Free: 5 req/min) | Implement request throttling or upgrade to paid plan |
500 | Internal Server Error | Server error occurred | Retry request after a few seconds, contact support if persists |
503 | Service Unavailable | API temporarily unavailable | Wait and retry, check status page for maintenance updates |
Learn more about error handling →
Need help? Contact support with your X-Request-ID for assistance.
Integrate Color Similarity Calculator with SDKs
Get started quickly with official Color Similarity Calculator SDKs for your preferred language. Each library handles authentication, request formatting, and error handling automatically.
Available for Node.js, Python, C#/.NET, and Android/Java. All SDKs are open source and regularly updated.
Integrate Color Similarity Calculator with No-Code API Tools
Connect the Color Similarity Calculator API to your favorite automation platform without writing code. Build workflows that leverage color similarity calculator data across thousands of apps.





All platforms use your same API key to access Color Similarity Calculator. Visit our integrations hub for step-by-step setup guides.
Frequently Asked Questions
How do I get an API key for Color Similarity Calculator?
How many credits does Color Similarity Calculator cost?
Each successful Color Similarity Calculator API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful color similarity calculator lookups.
Can I use Color Similarity Calculator in production?
The free plan is for testing and development only. For production use of Color Similarity Calculator, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Color Similarity Calculator from a browser?
What happens if I exceed my Color Similarity Calculator credit limit?
When you reach your monthly credit limit, Color Similarity Calculator API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.



