While the hype of #thedress  is deservedly over, my paper on this will appear soon in “Der Ophthalmologe”, prompting me to a renewed attempt at colour sampling of its #colors . Outcome is the attached figure. You can see more here

http://michaelbach.de/ot/col-dress/

and the full stand-alone R  code to produce this figure here

http://michaelbach.de/ot/col-dress/colorSampling.R

Initially I had programmed the colour space conversions with my own RGB→XYZ matrix in a loop. Finding, finally, by chance the built-in "convertColor" function and converting everything to vector operation speeded up the processing by about a factor of 100.

Looking forward to corrections to my R code!

Best, Michael.