Peter Kovesi
Cyclic perceptually uniform colour-maps. From the ColorCET site:
Cyclic colour maps have colours that are matched at each end. They are intended for the presentation of data that is cyclic such as orientation values or angular phase data. They require particular care in their design (the standard colour circle is not a good map).
CET C1
CET C1s
CET C2
CET C2s
CET C3
CET C3s
CET C4
CET C4s
CET C5
CET C5s
CET C6
CET C6s
CET C7
CET C7s