Ranked in these QuestionsQuestion Ranking
Pro Eases visual processing
Different colors within the same color scheme to quickly distinguish the layout (px, %, ..) and other declaration blocks from the colors (background-color; color); that eases the visual processing, thus increases reading speed, while reading CSS.
Although not mentioned in the list of supported editors, on GitHub you can find a folder Notepad++ with xml files.
Sadly it does not seem to work with newer Notepad++ versions.
Pro Light & dark themes
Dark theme does a good job of contrasting kvps.
Pro There are versions for a lot of applications or it's easy to make your own
There are ready-made packages for Vim, IntelliJ, Emacs, iTerm, etc.
If your app isn't supported the website explains clearly what colors are used, so it should be easy to wrap up your own.
Pro Comes in 5 different variants
Comes in 5 different variations: Tomorrow, Tomorrow Night, Tomorrow Eighties, Tomorrow Blue and Tomorrow Night Bright.
Con Bad theme
First of all, in the Tomorrow Theme official repository, the IntelliJ Idea theme is just a color scheme. Second of all, it looks very bad on IntelliJ.
Con Looks bad
At least on Neovim.