English: This is the standard CIE xyY chromaticity diagram that shows the spectrum locus (colored circles), the sRGB primaries (colored squares), the FOGRA39 CMY/RGB data (colored triangles) and converted CIE Lab coordinates for ultramarine blue, cadmium red and yellow ochre (crosses). It also shows the choromaticity coordinates of the imaginary primaries X, Y and Z. The polygons denote the enclosed gamut for each set of primaries. There is no polygon associated with pigments since mixing trajectories are difficult to predict. The R source for generating this graph is available at: https://github.com/mittimithai/colorspacegraphs