Board Thread:Suggestions forum/@comment-26453572-20150606204907/@comment-27723099-20150607133149

(vanilla) Minecraft light has no colour. It's just a value of brightness that (I think) is in the range from 0 to 15 (4 bit). One value is saved for every block (including air blocks). Colour would make the whole system much more complicated. But shader mods could add light colours.