<sod> }}</ref> Young originally proposed red, green and violet, and Maxwell changed violet to blue; Helmholtz proposed "a slightly purplish red, a vegetation-green, slightly yellowish, and an ultramarine-blue..<ref><eod>
<sod> }}</ref> Young originally proposed red, green and violet, and Maxwell changed violet to blue; Helmholtz proposed "a slightly purplish red, a vegetation-green, slightly yellowish, and an ultramarine-blue.<ref><eod>