When the documentation was updated in SDK 8.2 the section in the User Experience Guide which shows what colours are available on the various devices changed from showing the colours to showing just grey! This is pretty useless when you want to know what colour to use. Here is the original section (taken from 8.1.0 SDK):

And here it is now from 8.2 onwards (taken from 8.2.1 SDK):

The link to this on the web is:
Hopefully you can see how useless this is and can revert this back to showing colour.