[pstricks] random colour

[Alexander Grahn]

Good afternoon,

inspired by https://tex.stackexchange.com/q/373866 I wonder whether it
were possible to add "random"/"randomgray" as colour names to PSTricks.

In the linked example, I temporarily overlayed the `setrgbcolor' built-in with my own
definition to randomly set the stroking colour.

Or is there already such a thing available which I have missed so far?

Alexander