🏷️ Color Name Finder
Enter a color and get its nearest CSS color name — measured by CIEDE2000 perceptual distance — plus the next closest matches.
Closest CSS color name
dodgerblue
#1e90ff · ΔE 3.12
Other near matches
cornflowerblue
#6495ed
steelblue
#4682b4
lightslategray
#778899
slategray
#708090
royalblue
#4169e1
Nearest of the 141 CSS Color 4 named colors by CIEDE2000 (ΔE00) perceptual distance — a chatbot guesses; this measures. 🔒 Computed in your browser.
How the color name finder works
Your color and each of the standard CSS Color 4 named colors are converted to CIELAB, then compared with the CIEDE2000 (ΔE00) formula — the industry-standard perceptual color-difference metric. The name with the smallest ΔE is the closest; a ΔE under 1 is an exact match and under ~2.3 is barely distinguishable to the eye.
This is a measurement, not a guess: nearest-of-N by CIEDE2000 is exactly the kind of thing a chatbot gets wrong (it will name a plausible-but-not-nearest color). The set is the frozen, canonical CSS named-color list — no drifting 30,000-name database to maintain.
Frequently asked questions
How do I find the name of a color?
Enter the HEX, RGB or HSL value; the tool measures the perceptual distance (CIEDE2000) from your color to every CSS named color and returns the closest one, plus other near matches.
What is ΔE (CIEDE2000)?
ΔE is the perceptual distance between two colors in CIELAB space; CIEDE2000 is the refined, industry-standard formula. A ΔE of 0 is identical, under ~1 is indistinguishable, and under ~2.3 is a "just noticeable difference".
Which color names does it use?
The canonical CSS Color Module Level 4 named colors (the <named-color> keywords like "dodgerblue", "tomato", "rebeccapurple"), one entry per distinct name. It is a fixed, standard list, so results are stable.
Why not match against thousands of names?
Huge community name lists drift and disagree, which is a maintenance and accuracy liability. Matching the frozen, standard CSS set gives reproducible, citable results that map directly to what you can write in CSS.
Is the nearest name always exact?
Only if your color happens to equal a named color (ΔE 0). Otherwise it is the closest of the standard set — the ΔE shown tells you how close. Use the HEX for the exact color.