ChromaticityPlot

ChromaticityPlot[colspace] plots a 2D slice of the color space colspace. 

ChromaticityPlot[color] plots the specific color.

ChromaticityPlot[{col1,col2,…}] plots multiple colors and color spaces.

ChromaticityPlot[image] plots the pixels of image as individual colors.

ChromaticityPlot[…,refcolspace] uses the reference color space refcolspace.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.