Swatch

[Hosun]

Hi,

There is a cube in the screenshot. 
It indicates: In web color (click to correct). 

What's that for?

Hosun

 

[Monika Gause · Accepted solution]

You can safely forget that.

It comes from the nineties and marks that your color does not match the 256 so called web safe colors that can be displayed on an 8-bit monitor. Truth is: web safe colors actually never worked at all (and the web pages explaining the technical background are long gone). And the time when monitors could only display 256 colors at once are long gone.

It's really that old.

Here it is: the really safe color palette: https://web.archive.org/web/20210303202304/https://www.asc.ohio-state.edu/wilkins.5/color/websafecol...