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How hexcolors work

Kevin Beck

August 13, 2019

Hexcolors are six-digit strings representing color values with a leading hash.

They’re a numerical form of RGB (Red/Green/Blue), with the first two digital representing R, digits three and four representing G, and digits five and six representing B.


For values where the R, G, and B couplets have the same value, the hexcolor can be shortened to just three digits.

For example, #FFFFFF is white. You can also write it as #FFF.