Color Picker

Color Picker Online — Free HEX, RGB, HSL & CMYK Color Inspector

Inspect, pick, and convert color codes between HEX, RGB, HSL, HSV, and CMYK representations directly in your browser. Features an integrated Eyedropper tool and WCAG 2.1 contrast ratio checker for accessible UI design.

Technical Specifications & Conversion Formulas

• HEX to RGB:

$$RGB = (R_{hex}, G_{hex}, B_{hex})$$

• RGB to HSL: Computes hue angle ($0^circ-360^circ$), saturation percentage ($0-100%$), and lightness.
• WCAG 2.1 Contrast Formula:

$$L = 0.2126 R + 0.7152 G + 0.0722 B, \quad \text{Ratio} = \frac{L_1 + 0.05}{L_2 + 0.05}$$

How to Use Color Picker Step-by-Step

1. 1Pick Color: Click the Eyedropper icon to sample any pixel color from your screen or image.
2. 2Adjust Values: Use sliders to tune HSL, RGB, or HEX inputs.
3. 3Check Accessibility: Inspect the WCAG contrast ratio indicator for text legibility.
4. 4Copy Code: Click to copy HEX, RGB, or HSL strings to your clipboard.

Deep Technical Explanation & Color Space Conversion

Color values represent light spectra in different mathematical coordinate systems:

• HEX / RGB: Additive color space based on Red, Green, and Blue sub-pixel intensities ($0-255$).
• HSL / HSV: Cylindrical coordinates describing Hue (color angle), Saturation (vibrancy), and Lightness/Value (brightness). Ideal for designers adjusting color schemes.
• CMYK: Subtractive color space (Cyan, Magenta, Yellow, Key/Black) used in physical offset and digital printing press production.

Our client-side inspector converts between all 5 color spaces in real time, evaluates WCAG 2.1 AA/AAA compliance contrast ratios against white/black backgrounds, and generates CSS-ready color variables.

Practical Use Cases

• UI/UX Web Design: Sample colors from reference mockups and convert them into CSS HSL/HEX variables.
• Accessibility Auditing: Verify contrast ratios between text fonts and background containers to ensure WCAG 2.1 compliance.
• Print Production: Convert web RGB color schemes into print-ready CMYK values.

Frequently Asked Questions (FAQs)

Does the Eyedropper tool work on all web pages?

Yes, modern browsers (Chrome, Edge, Opera) support native EyeDropper APIs for precise screen sampling.

How does the WCAG contrast ratio score work?

WCAG 2.1 requires a minimum contrast ratio of 4.5:1 for normal body text and 3:1 for large headings to ensure readability for visually impaired users.

Related Developer & Design Tools

• Hex to RGB: Convert color strings directly.

High-Performance Client-Side Image Processing & Web Vitals

In modern digital publishing, web application performance and visual user experience depend heavily on image optimization. Large, uncompressed raster graphics consume excessive network bandwidth, inflate mobile data usage, and negatively impact Google Core Web Vitals—specifically Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS) metrics.

Our client-side image processing utility uses HTML5 Canvas 2D contexts, WebGL hardware acceleration, and modern image encoding codecs (WebP, AVIF) to process image assets in real time inside your browser session.

Key Optimization & Processing Benefits:

• Hardware-Accelerated Canvas Rendering: Leverages your device's GPU for real-time bitmap resampling, cropping, and color space transformations.
• Lossless EXIF Metadata Management: Option to inspect, preserve, or strip privacy-sensitive EXIF tags (GPS coordinates, camera serial numbers, capture timestamps) before sharing images online.
• Next-Gen Web Codec Compression: Convert legacy PNG/JPG files to WebP and AVIF formats, achieving up to 70% file size reduction without visible quality degradation.

Next-Generation Image Codec Optimization & Browser Canvas Engine

Digital image processing on modern web applications requires balancing visual fidelity against asset file size. Uncompressed raster images consume excessive network bandwidth, slow down web page load speeds, and negatively impact Google Core Web Vitals performance metrics—specifically Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS).

Our image workspace utilizes HTML5 Canvas 2D contexts, WebGL hardware acceleration, and modern image encoding codecs (WebP, AVIF, PNG, JPEG) to process bitmap buffers in real time inside your browser session.

Technical Performance Highlights:

• GPU-Accelerated Rendering: Uses WebGL and Canvas 2D hardware pipelines to perform fast pixel resampling, aspect ratio calculations, and color space transformations.
• Privacy & EXIF Tag Inspection: Allows users to inspect, preserve, or strip privacy-sensitive EXIF metadata tags (GPS locations, camera serial numbers, exposure specs) before sharing photos online.
• Lossless & Lossy Codec Selection: Converts legacy PNG/JPG files to modern WebP and AVIF formats, achieving up to 70% reduction in disk storage requirements without visible compression artifacts.
• 100% Browser Execution: Images are never transmitted to cloud storage buckets or external servers, protecting personal photographs and proprietary brand graphics.