Picking the right colors isn't just about what looks good—it's about what works for everyone. About 8% of men have some form of color blindness, which means millions of people might struggle to read your design, use your app, or understand your charts.
The good news? Creating accessible color palettes isn't hard once you know the basics. You don't have to sacrifice aesthetics for accessibility. You just need to understand which color combinations cause problems and how to pick alternatives that look great for everyone.
This guide walks you through the practical steps of creating color blind friendly palettes. Whether you're designing a website, making a presentation, or building an app—you'll learn what works, what doesn't, and how to test your choices.
What Is a Color Blind Friendly Palette?
A color blind friendly palette is a collection of colors carefully selected to remain distinguishable to people with various types of color vision deficiency. These palettes prioritize differences in brightness, saturation, and hue that persist even when certain colors are confused or appear similar due to missing or defective cone cells in the eye.
The key principle is that accessible palettes do not rely solely on hue to differentiate between elements. Instead, they incorporate sufficient contrast in lightness and saturation, use patterns or textures as supplementary indicators, and avoid color combinations known to cause confusion for common types of color blindness.
An effective color blind friendly palette maintains visual appeal while being functional. It does not mean using only grayscale or limiting yourself to a boring palette—vibrant, beautiful designs are absolutely possible with thoughtful color selection that considers how different types of color vision perceive the same hues.
Types of Color Blindness and Color Conflicts
Protanopia and Protanomaly (Red Deficiency): People with these conditions have difficulty distinguishing between red and green, often seeing both as yellowish-brown or muddy tones. Red appears darker and less vibrant. Red text on green backgrounds or red and green used together become nearly impossible to differentiate.
Deuteranopia and Deuteranomaly (Green Deficiency): This is the most common form, affecting about 5% of males. Similar to Protanopia, red and green appear as variants of yellow or brown. However, green appears darker while red might seem more orange. Green and red combinations are problematic, as are green and brown.
Tritanopia and Tritanomaly (Blue Deficiency): Much rarer, affecting less than 0.01% of people. These individuals confuse blue with green and yellow with violet. Blue and yellow combinations create problems, as do blue-green and purple-pink distinctions.
Understanding these specific confusions helps designers avoid problematic color pairings. The most critical conflicts to avoid are red-green, green-brown, blue-purple, light green-yellow, and red-brown combinations without sufficient brightness differences.
Why Traditional Palettes Fail for Accessibility
Many popular color palettes fail accessibility tests because they were designed purely for aesthetic appeal to people with typical color vision. Rainbow color schemes, for instance, use red-orange-yellow-green-blue-purple sequences where adjacent colors become indistinguishable to people with color blindness.
Traffic light systems using red and green without additional indicators pose serious problems. To someone with red-green color blindness, both lights may appear as the same yellowish color, forcing them to memorize position rather than recognize color. This is why modern traffic lights also vary in position and sometimes shape.
Brand colors often prioritize corporate identity over accessibility. Using a green brand color for success messages and red for errors creates confusion when these colors look identical to colorblind users. Similarly, data visualizations that rely on red-to-green heat maps or multicolored pie charts without labels become incomprehensible.
The assumption that "everyone sees colors the same way" leads to these failures. Designers who test their work only with their own vision miss significant accessibility issues that affect millions of users.
Principles for Creating Color Blind Friendly Palettes
Principle 1: Use High Contrast — Ensure sufficient brightness difference between colors. Even if hues become confused, stark differences in lightness (light vs. dark) remain visible. Aim for a contrast ratio of at least 4.5:1 for text and 3:1 for large UI elements, following WCAG guidelines.
Principle 2: Avoid Problematic Combinations — Never use red and green together without additional differentiation. Avoid green-brown, red-brown, blue-purple, and light green-yellow pairings. If you must use these combinations, ensure extreme brightness differences or add patterns, icons, or labels.
Principle 3: Include Blue — Blue is distinguishable to nearly everyone except those with Tritanopia (extremely rare). Blue contrasts well with red, orange, yellow, and most other hues. Blue combined with orange or yellow creates accessible palettes for the vast majority.
Principle 4: Do Not Rely Solely on Color — Add redundant encoding through icons, patterns, textures, labels, or shapes. If a line chart uses different colored lines, also vary line styles (solid, dashed, dotted). If buttons change color states, also change text, icons, or borders.
Principle 5: Test with Simulation Tools — Use color blindness simulators to preview how your palette appears to people with different types of color vision. This reveals problems before deployment and allows iterative refinement.
Tools to Test and Simulate Palettes
Testing your color palette through simulation tools is essential for verifying accessibility. CoBlind offers several free tools specifically designed to help designers create and test accessible color schemes. The Color Blindness Image Simulator allows you to upload designs and instantly see how they appear with different types of color vision deficiency.
The Color Palette Checker enables you to input specific hex color values and analyze how well they work together for colorblind users. It shows color confusion patterns and provides contrast ratio calculations, helping you refine palettes before implementation.
For testing complete websites, the Website Checker simulates how your entire site appears to users with various types of color blindness. This comprehensive view reveals accessibility issues across all pages, navigation elements, and interactive components.
Other helpful tools include browser extensions like Colorblinding, desktop applications like Color Oracle, and design software plugins like Stark for Figma and Sketch. These tools should be integrated into your regular design workflow, not just used as final checks.
How to Check Contrast and Visibility
Contrast ratio measures the difference in luminance between two colors. WCAG (Web Content Accessibility Guidelines) establishes minimum contrast ratios: 4.5:1 for normal text, 3:1 for large text (18pt or 14pt bold), and 3:1 for UI components and graphics. Level AAA compliance requires even higher ratios: 7:1 for normal text and 4.5:1 for large text.
To calculate contrast ratio, use the luminance formula: L = 0.2126R + 0.7152G + 0.0722B (where RGB values are linearized). Then apply the contrast formula: (L1 + 0.05) / (L2 + 0.05), where L1 is the lighter color. Many online calculators automate this process—simply input two hex codes to get the ratio.
Beyond numerical ratios, visually verify that elements remain distinguishable when converted to grayscale. If two colors look nearly identical in grayscale, they lack sufficient brightness difference regardless of hue. This simple test catches many accessibility problems that contrast ratio calculations might miss.
Examples of Effective Color Blind Friendly Palettes
Blue and Orange Palette
Colors: Dark Blue (#1E40AF), Orange (#F97316), Light Blue (#BFDBFE), Dark Orange (#C2410C)
Blue and orange provide excellent contrast for all color vision types. This palette works well for data visualizations, dashboards, and charts where two distinct categories need clear differentiation.
Teal, Magenta, and Gold Palette
Colors: Teal (#14B8A6), Magenta (#D946EF), Gold (#FBBF24), Dark Teal (#0F766E)
This vibrant palette maintains distinction across color blindness types. Teal and magenta differ significantly in brightness, while gold provides a third distinct option. Excellent for multi-category visualizations.
Colorblind-Safe Traffic Light System
Colors: Dark Green (#15803D) with checkmark icon, Bright Yellow (#FACC15) with warning icon, Dark Red (#B91C1C) with X icon
By combining color with icons and ensuring high brightness contrast, this status indicator system works for everyone. Icons provide redundant encoding so color alone is not required.
Dos and Don'ts in Color Blind Friendly Palette Design
✓ DO These Things
- Use blue as a primary color—it is distinguishable to nearly everyone
- Ensure high contrast ratios (minimum 4.5:1 for text)
- Add icons, patterns, or labels alongside color coding
- Test designs with color blindness simulation tools
- Use texture or pattern fills in data visualizations
- Choose colors that differ significantly in brightness
- Consider using blue-orange or purple-yellow combinations
- Test your palette in grayscale to verify brightness differences
✗ DON'T Do These Things
- Use red and green together without additional differentiation
- Rely solely on color to convey critical information
- Use low contrast color combinations
- Assume everyone sees colors the same way you do
- Use green-brown or blue-purple without extreme brightness differences
- Skip testing with simulation tools
- Use rainbow color schemes for sequential or categorical data
- Ignore WCAG contrast guidelines
Accessible vs Inaccessible Color Combinations
| Use Case | ❌ Avoid | ✓ Use Instead |
|---|---|---|
| Status Indicators | Red (error) + Green (success) | Dark Red + Icon vs Dark Blue + Icon |
| Data Visualization | Rainbow gradient | Blue to Orange or Purple to Yellow |
| Call-to-Action Buttons | Light green text on white | Dark blue background with white text |
| Charts & Graphs | Red, green, brown lines | Blue (solid), Orange (dashed), Purple (dotted) |
| Links | Blue text on black (low contrast) | Bright blue + underline on white |
| Heat Maps | Red to green gradient | White to dark blue or Yellow to purple |
Frequently Asked Questions
What is the most accessible color palette?
Blue and orange combinations work best for the widest range of color vision types. Dark blue paired with bright orange provides excellent contrast for protanopia, deuteranopia, and tritanopia. Adding white, black, or gray creates a versatile palette suitable for most design needs.
Can I use green in my color palette?
Yes, but never rely on green alone to convey information, and never pair it with red, brown, or orange without additional indicators. Use very dark green (nearly black) or very light green (nearly white) to ensure brightness contrast. Always add icons, labels, or patterns when using green for important elements.
How many colors should be in an accessible palette?
For categorical data, limit yourself to 5-7 distinct colors maximum. More colors increase the likelihood of confusion. If you need more categories, use patterns, textures, or icons in addition to color. For sequential data like heat maps, use single-hue gradients (light to dark blue) rather than multi-hue gradients.
Do I need to avoid all bright colors?
No. Bright, vibrant colors are perfectly acceptable if they have sufficient contrast and avoid problematic combinations. Bright blue, bright orange, bright magenta, and bright yellow can all work well. The key is ensuring brightness differences between adjacent or related colors, not avoiding saturation.
What contrast ratio should I aim for?
For WCAG AA compliance (standard), aim for 4.5:1 for normal text and 3:1 for large text and UI elements. For AAA compliance (enhanced), target 7:1 for normal text and 4.5:1 for large text. Higher ratios are always better for readability and accessibility.
Are color blindness simulators accurate?
Simulators provide approximations of how color blind individuals see colors, but individual experiences vary. They are excellent tools for identifying obvious problems and testing palettes, but should be supplemented with actual user testing when possible. Different simulators may show slightly different results, so test with multiple tools.
Can I use my brand colors if they are not accessible?
Brand colors can often be adjusted in shade, tint, or application to improve accessibility while maintaining brand recognition. Use darker or lighter versions for better contrast, combine color with typography or icons, or reserve problematic brand colors for non-critical decorative elements while using accessible colors for functional UI.
Should every design element be tested for color blindness?
Prioritize testing elements that convey information, enable interaction, or distinguish categories. Critical items include navigation, buttons, form validation, status indicators, charts, and instructional content. Purely decorative elements that do not communicate information can be lower priority, though universal accessibility is always ideal.
The Bottom Line
Creating color blind friendly palettes isn't about limiting your design—it's about being smarter with your choices. Avoid red-green combinations, use high contrast, and don't rely on color alone to convey information. Add icons, patterns, or labels as backup. It's not complicated once you know the rules.
Blue and orange are your best friends. Test with simulation tools. When in doubt, check your design in grayscale—if you can still tell things apart by brightness alone, you're probably in good shape.
Accessible design benefits everyone, not just color blind users. High contrast helps in bright sunlight. Icons clarify meaning across language barriers. These practices make your work better for all users while removing barriers for the millions who see colors differently.
Test Your Color Palette
Use our free tools to analyze and simulate your color palettes for accessibility. See exactly how your designs appear to people with different types of color vision.