siutil. Color Name Finder
processed in your browser · never uploaded

Color

#1E90FF

Type a HEX (#1e90ff) or RGB (30,144,255) value, or use the picker.

Closest color names

Click a row to copy the color name, or the HEX chip to copy the code.

The dictionary is the 148 CSS / X11 named colors. Matching runs in your browser — colors are never uploaded.

A color name finder for when you have a HEX or RGB value and need to know what the color is called. Type a HEX (e.g. #1e90ff, or the short form #1cf), an RGB value (30,144,255 or rgb(30,144,255)), or pick a color with the color box, and it returns the closest matches from the 148 CSS / X11 named colors — up to six, ranked by visual similarity. Matching is done in the Lab color space using ΔE (CIE76) distance, so the names you see are the ones a human eye would call closest, not just the nearest RGB numbers. Click any row to copy the color name (e.g. dodgerblue), or click the HEX chip to copy the code — both drop straight into a CSS color declaration or a design tool. On supported browsers (Chrome / Edge) the "Pick from screen" eyedropper lets you grab the color of any pixel on screen and look up its name, with no image upload at all. Handy for naming CSS classes, finding a rough name for a color you used in a document or illustration, or figuring out what to call a color when all you have is the hex code. Everything — the input and the matching — runs entirely in your browser; the colors you enter or pick are never uploaded, stored, or sent to a server. Need to convert HEX↔RGB, or build a palette? Take the color straight into our color code converter or color palette generator.

How to use

  1. Enter a HEX (e.g. #1e90ff) or RGB value (e.g. 30,144,255), or pick a color with the color box. On supported browsers you can also use the "Pick from screen" eyedropper.
  2. It lists the closest CSS named colors, ranked by visual similarity (smallest ΔE first), up to six matches.
  3. Click a row to copy the color name, or the HEX chip to copy the code — ready to paste into CSS or a design tool.

FAQ

Are the colors I enter or pick uploaded anywhere?

No. The input and the matching all run entirely in your browser. The colors you type or grab with the screen eyedropper are never uploaded, stored, or sent to a server — the tool is fully local.

Which color name dictionary does it search?

It searches the 148 CSS / X11 named colors (such as dodgerblue, tomato and teal). These are valid CSS color keywords, so copying a name lets you paste it straight into your styles.

How is the "closest color name" decided?

Both your color and each named color are converted to the Lab color space, and the results are ranked by ΔE (CIE76) distance — smallest first. Because Lab matches human perception, the order reflects which names look closest, not just which RGB numbers are nearest.

Can I look up a name from an RGB value or hex code?

Yes. Type a HEX like #1e90ff, or an RGB value like 30,144,255 or rgb(30,144,255), and it finds the nearest color names. Three-digit short hex such as #1cf works too.

Can I find the name of a color shown on my screen?

On supported browsers (Chrome, Edge), the "Pick from screen" button opens an eyedropper so you can grab the color of any pixel on screen and look up its name — no image upload required. On other browsers, use the color box or type the hex / RGB value instead.