Dark mode in 5 minutes, with inverted lightness variables

Lea Verou shows a method to implement dark mode, not by swapping entire colors, but by simply changing their lightness

The basic idea is to use custom properties for the lightness of colors instead of the entire color. Then, in dark mode, you override these variables with 100% - lightness. This generally produces light colors for dark colors, medium colors for medium colors, and dark colors for light colors, and still allows you to define colors inline, instead of forcing you to use a variable for every single color.

For best results she also taps into LCH colors.

LCH is a much better color space for this technique, because its lightness actually means something, not just across different lightnesses of the same color, but across different hues and chromas.

Dark mode in 5 minutes, with inverted lightness variables →

About the author

Bramus is a Freelance Web Developer from Belgium. From the moment he discovered view-source at the age of 14 (way back in 1997), he fell in love with the web and has been tinkering with it ever since (more …)

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