compare all of the 5s next to each other and the blue is electric where the other colors look like a tint is applied.

obviously YMMV based on monitor gamma and color profile, but was the intention that each # have a similar tint to the pure color? Because this appears to essentially be a similar system to RGB/CMYK in different notation, over a Munsell Color System implementation that creates equivalence in color perception based on intensity scaling.