Tools / Color Converter / HEX → RGB

HEX to RGB Converter.

A hex color is just three bytes written in base-16: two digits for red, two for green, two for blue. Converting HEX to RGB means splitting the string into those three pairs and reading each pair as a 0-255 decimal number — nothing is lost, the two notations describe exactly the same sRGB color.

Enter a HEX color

RGB —

All formats

The HEX → RGB formula

R = parseInt(hex[0:2], 16) · G = parseInt(hex[2:4], 16) · B = parseInt(hex[4:6], 16). A 3-digit shorthand like #1af expands by doubling each digit (#11aaff).

Worked example

Convert #1B2A4E:

Strip the # → 1B2A4E
Red: 1B (hex) = 1×16 + 11 = 27
Green: 2A (hex) = 2×16 + 10 = 42
Blue: 4E (hex) = 4×16 + 14 = 78
Result: rgb(27, 42, 78)

JavaScript

const hex = "#1B2A4E".replace("#","");
const r = parseInt(hex.slice(0,2),16); // 27
const g = parseInt(hex.slice(2,4),16); // 42
const b = parseInt(hex.slice(4,6),16); // 78

FAQ

Does hex include opacity?

8-digit hex (#RRGGBBAA) adds an alpha byte. The first 6 digits are the same RGB; the last two are alpha 0-255 (FF = fully opaque).

Is #abc the same as #aabbcc?

Yes. 3-digit hex is shorthand — each digit is doubled, so #abc expands to #aabbcc.

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Library

Colour references for your next project

Compare the original references behind this archive. Check the contents, edition and format before choosing a book.

Book links are Amazon Associates affiliate links. Your price is unchanged; a small commission supports the archive. As an Amazon Associate we earn from qualifying purchases.

Sanzo Wada

A Dictionary of Color Combinations

The 2010 Seigensha republication of the 1933 original. Japanese import.

Every combination in it is already browsable free here, hex values and all. Buy this one for the object rather than the data — Seigensha's matte plates and Japanese binding, or a citable copy of the 1933 original. If you want plates this archive doesn't have, Vol. 2 is the one.

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Sanzo Wada

A Dictionary of Color Combinations Vol. 2

Seigensha, 2020. Japanese import.

Wada's 1935–1938 follow-ups: 72 plates on the Japanese seasons and 165 drawn from early-century fashion, interior, and graphic design. Not in Vol. 1. Not in this archive. The book itself is a design object — Japanese binding, matte pages, zero captions.

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Torn between the two Wada dictionaries? Vol 1 vs Vol 2, compared plate by plate →