JuliaLang/Color.jl — pull request #64 by jiahao (2014-09-29 16:01:49+00:00)
Title: Use correct vector space definitions

- Undefines errorneous +, * on LCHUv
- Defines +, * on XYZ as a linear vector space
- Defines +, * on all other ColorValues using intermediate arithmetic in
XYZ space

cc @rennis250 @timholy