Color Name Finder

Find the closest CSS colour name for any hex code, using the perceptual CIEDE2000 colour difference.

What is the name of this hex colour?

Pick or type a hex colour and the tool compares it with all 148 CSS named colours using CIEDE2000, the perceptual colour-difference formula. The smallest ΔE is the closest name; under 2 the colours look practically identical.

Understanding ΔE2000

ΔE	What you see
< 1	No visible difference
1–2	Barely visible, even side by side
2–10	Visible at a glance but similar
> 10	Clearly different colours

Handy for naming design tokens, writing alt text and colour descriptions, or picking a quick CSS keyword. Convert the colour to RGB, HSL or OKLCH with the Color Converter.

Frequently asked questions

How many CSS colour names are there?

148, including rebeccapurple and the grey/gray duplicates.

Why not just compare RGB values?

Equal RGB distances do not look equally different to the eye; CIEDE2000 is built to match human perception.

Should I use colour names or hex codes in CSS?

Both work everywhere. Hex (or rgb/oklch) gives you exact brand colours; names are handy for quick prototypes and readable code.