colorexa

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Quickly lookup for a color by typing or highlighting its hexadecimal code.A simple tool to lookup for colors specified as an RGB triplet in hexadecimal format. The background of the pop-up bubble refreshes automatically to represent the color typed in its text field or highlighted in the page. Supports full (six-digits) and abbreviated (three-digit) hexadecimal color codes.

Useful when you want to quickly check a color found in the source code of a page or stylesheet.

Visit the extension's website for a live preview, as well as a bookmarklet version.