Color Blind Safe Design with Tailwind CSS - Tailwind CSS Tutorial

intermediate10 min readbest-practice

Color Vision Deficiency Overview

About 1 in 12 men and 1 in 200 women have some form of color vision deficiency. The most common type, deuteranomaly, makes red and green appear similar. Your design must not depend on these colors being distinguishable.

Safe Color Combinations

<!-- Instead of red vs green (problematic) -->
<span class="text-emerald-600">Approved</span>
<span class="text-red-600">Rejected</span>

<!-- Better: Add icons and shapes -->
<span class="flex items-center gap-1.5 text-emerald-600">
  <svg class="w-4 h-4" fill="currentColor"><circle cx="8" cy="8" r="6"/></svg>
  Approved
</span>
<span class="flex items-center gap-1.5 text-red-600">
  <svg class="w-4 h-4" fill="currentColor"><polygon points="8,2 14,14 2,14"/></svg>
  Rejected
</span>

Color-Blind-Safe Palettes

Blue + Orange: Distinguishable by all common color blindness types
Blue + Yellow: High contrast for deuteranopia and protanopia
Blue + Red: Works for tritanopia (the rarest type)
Avoid: Red + Green, Red + Brown, Green + Orange
When using red/green semantically, always add a secondary indicator

Testing Your Design

Use our Color Blindness simulator to preview all deficiency types
Chrome DevTools: Rendering tab has a vision deficiency simulator
Convert your design to grayscale; information should still be clear
Ask: Can a user complete every task if they cannot see color at all?

Frequently Asked Questions

Can I use red and green in my design?

Yes, but never as the only differentiator. Always add text labels, icons, or patterns alongside red/green so color-blind users can distinguish elements by shape or text.

Which colors are safest for color-blind users?

Blue is the safest single color as it is distinguishable by virtually all color vision types. Pair blue with orange or yellow for the best color-blind-friendly combination.