go here http://www.lyon-court.com/lordlyon/242.html

I don't see anything here that mentions color at all.

It does say, however, "Chiefs have the right to wear their Crests as badges"
I guess this would indicate one color.

It doesn't say anything about reproducing on paper etc. That's in the info leaflet that you mentioned.

If your intent is to honor your clan and chief I can't imagine him not saying it was OK to have it in color.