As you have found, I also have been told I can only get Ruse Black unless I pay extra. I spoke to Motability and apparently the garage I am using is only offering Hondas Ruse Black as standard, White Pearl, Radiant Red, Still Night are £650, and Diamond Dust is £975. I could try and find a garage elsewhere in Scotland that offer other colours but I think I will just stick with black, knowing they will collect and drop off for services and mot.