While it is all personal this is how I like and have done my games Pete, if you remember how they look.
Cool white frosted for all GI - I really do not like colour GI as it washes out the colours in the plastics, frosted purely to protect the eyes.
Colour match all coloured inserts with the exception of Yellow and Orange - I find white can make colours look 'fluro'
Yellow and orange inserts, test with colour matching, cool and warm white - I have used all three in different machines under these colour inserts.
As Nino said, there is no wrong way to do it. Just play with what you like the look of.
