Color Theory for Web Developers

Choosing colors is hard. Understanding color theory makes it easier.

Color Models

RGB (Red, Green, Blue)

Used for screens. Values range from 0-255 per channel.

• White: rgb(255, 255, 255)
• Black: rgb(0, 0, 0)
• Red: rgb(255, 0, 0)

HSL (Hue, Saturation, Lightness)

More intuitive for designers.

• Hue: 0-360 degrees on the color wheel
• Saturation: 0-100% (gray to vivid)
• Lightness: 0-100% (black to white)

Hex Codes

RGB values in hexadecimal: #FF5733 = rgb(255, 87, 51)

Color Harmonies

Complementary

Colors opposite on the wheel. High contrast, vibrant.

Analogous

Colors next to each other. Harmonious, calm.

Triadic

Three colors equally spaced. Balanced, colorful.

Monochromatic

Same hue, different lightness/saturation. Elegant, cohesive.

Accessibility

• Contrast ratio: Text needs at least 4.5:1 contrast against background
• Don't rely on color alone: Use icons, text, or patterns too
• Test with color blindness simulators: ~8% of men are color blind

Use our Color Contrast Checker to verify accessibility.

Practical Tips

1. Start with one primary color - Build your palette around it
2. Use HSL for variations - Adjust lightness for shades, saturation for emphasis
3. Limit your palette - 3-5 colors is usually enough
4. Test in context - Colors look different on different backgrounds

Useful Tools

• Color Converter - Convert between hex, RGB, HSL
• Color Palette Generator - Generate harmonious palettes
• Color Contrast Checker - Verify accessibility
• Color Blindness Simulator - See how color-blind users see your design

Conclusion

Good color choices improve usability and aesthetics. Use our tools to experiment and find the perfect palette for your project.