Color Picker
Suggested Colors for Better Contrast
Advanced Analysis
Color Blindness Simulation
Foreground: #000000 Background: #ffffff
Foreground: rgb(0, 0, 0) Background: rgb(255, 255, 255)
Foreground: hsl(0, 0%, 0%) Background: hsl(0, 0%, 100%)
Suggested Color Palette
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User Guide: Ultimate Color Contrast Checker
1. Overview
The Ultimate Color Contrast Checker is a tool that helps designers, developers, and content creators ensure their color combinations meet WCAG (Web Content Accessibility Guidelines) standards for readability and accessibility.
Key Features:
✔ Contrast Ratio Calculation – Checks if text is readable against a background
✔ WCAG Compliance Check – Verifies AA (4.5:1) and AAA (7:1) standards
✔ Color Blindness Simulation – Shows how colors appear to people with different vision types
✔ Color Suggestions – Recommends better color alternatives
✔ Palette Generator – Creates harmonious color schemes
✔ Dark/Light Mode – Toggle for comfortable viewing
2. How to Use the Tool
Step 1: Select Colors
Foreground Color (text color)
Use the color picker or enter a HEX, RGB, or HSL value.
Background Color
Adjust using the color picker or manual input.
Step 2: View Contrast Results
The tool instantly calculates the contrast ratio (e.g.,
4.5:1).Checks WCAG compliance (AA, AAA, and small text).
Displays PASS/FAIL indicators.
Step 3: Explore Advanced Features
A. Color Blindness Simulation
See how your colors appear to people with:
Protanopia (Red-blind)
Deuteranopia (Green-blind)
Tritanopia (Blue-blind)
Achromatopsia (Monochrome vision)
B. Color Suggestions
If your contrast is low, the tool suggests better alternatives, such as:
Lighten/Darken
Saturate/Desaturate
Complementary colors
Analogous & Triadic harmonies
C. Color Palette Generator
Generates a 5-color palette based on your selected foreground color.
D. Copy Color Codes
Switch between HEX, RGB, and HSL formats and copy them with one click.
3. Understanding WCAG Compliance
| Standard | Minimum Ratio | Purpose |
|---|---|---|
| WCAG AA | 4.5:1 | Standard text (≥ 16px) |
| WCAG AAA | 7:1 | Small text (< 16px) or high-contrast needs |
| Small Text | 4.5:1 | For readability on all screens |
🔴 Red icon = Fails accessibility
🟢 Green icon = Passes accessibility
4. Tips for Best Results
For Dark Mode:
Use light text on dark backgrounds (e.g.,
#FFFFFFon#121212).
For Light Mode:
Use dark text on light backgrounds (e.g.,
#000000on#FFFFFF).
Avoid Red-Green Combos:
These are problematic for color-blind users.
Test Multiple Variations:
Use the suggested colors if your contrast is too low.
5. Keyboard Shortcuts
Press Tab to navigate between input fields.
Enter to apply HEX/RGB/HSL changes.
6. Troubleshooting
❌ “Invalid Color” Error?
Make sure HEX codes start with
#(e.g.,#FF5733).RGB values should be
0-255(e.g.,rgb(255, 87, 51)).HSL values should be
hsl(360, 100%, 100%).
❌ Low Contrast Warning?
Try the suggested colors or adjust brightness.
