ColorHighlighter - is a plugin for the Sublime text 2 and 3, which underlays selected hexadecimal colorcodes (like "#FFFFFF", "rgb(255,255,255)", "white", etc.) with their real color. Also, plugin adds color picker to easily modify colors. Documentation: https://monnoroch.github.io/ColorHighlighter.
The package is slowing the performance with big scss files. Tested with a file that has 2500+ lines of code