Color Comparison Tool — Compare Two Colors Side-by-Side

Compare any two colors side-by-side with HEX, RGB, HSL values, WCAG contrast ratio, hue/saturation/lightness difference, and live UI preview. Copy or share comparisons with URL params.

Color A

#6366F1
RGB99, 102, 241
HSL239°, 84%, 67%

Color B

#EC4899
RGB236, 72, 153
HSL330°, 81%, 60%

Comparison

Contrast Ratio (A on B)1.27:1
WCAG AA (Normal Text)✗ Fail
WCAG AA (Large Text)✗ Fail
WCAG AAA (Normal)✗ Fail
Δ Hue / Sat / LightΔ91° / 3% / 7%

Live Preview

Background A
Headline on A

Body text on the first color background.

Background B
Headline on B

Body text on the second color background.

How to Compare Colors

Color comparison is essential for designers and developers building accessible interfaces. Enter or pick two colors to see them side-by-side with full HEX, RGB, and HSL values, plus an instant WCAG contrast ratio check.

The contrast ratio tells you whether your color combination meets Web Content Accessibility Guidelines (WCAG) 2.2. AA requires 4.5:1 for normal text and 3:1 for large text. AAA is stricter at 7:1 and 4.5:1 respectively. Use the live preview to see how headlines and body text render on each background.

Beyond accessibility, this tool helps you understand the relationship between two colors. The hue/saturation/lightness difference shows how visually similar or distinct your colors are — useful for picking complementary pairs or avoiding muddy combinations.

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Frequently Asked Questions

What is a good color contrast ratio?

For WCAG AA compliance, normal text needs a 4.5:1 ratio and large text (18pt+ or 14pt bold) needs 3:1. For AAA compliance, normal text needs 7:1 and large text needs 4.5:1. Always aim for at least AA on body text.

Why is the contrast ratio important?

About 8% of men and 0.5% of women have some form of color vision deficiency. Adequate contrast ensures your content is readable for users with low vision, in bright sunlight, on low-quality screens, or as they age. It is a legal requirement for many public-sector websites.

Can I share color comparisons?

Yes! The URL updates with ?a=HEX1&b=HEX2 parameters. Anyone opening that link will see your exact comparison. Use the Copy button to grab the values for documentation.

What does Δ Hue / Sat / Light mean?

Delta (Δ) values show the numerical difference between two colors in HSL space. A high hue delta means the colors are very different on the color wheel; a low hue delta with high lightness delta means the colors are similar but lighter/darker. This helps you pick colors with intentional contrast.