CSS Color 4 is now widely implemented. But it has been a long and bumpy ride! Why did it take so long, and why did it finally succeed?

So, CSS Color 4 adds Wide Color Gamut colors to CSS. But what is a gamut, anyway?

The gamut of a color space is the range of colors that can be represented, given the constraint that color component values can't be negative or greater than 100%.

That is a complete definition but if you really want to understand, in depth, what that means, the rest of this blog post is for you.