Crayons under the Spectrophotometer

Volhav writes: Like many as a child, the photographer Mark Meyer wondered what the difference between Yellow-Green and Green-Yellow was in that Crayola box of crayons. Using a monitor calibration tool and the Argyll 3rd party software he evaluated a box of 64 color box of Crayola crayons, and plotted them out with sRGB values. He even included a nice printable poster size version of the chart in his blog post. For the geek or curious this was a pretty interesting plot.