Remove hard to remember colours

Replace compound-named colours with single word ones.  For example, one
might have trouble remembering midnightblue vs navyblue vs
cornflowerblue vs sky blue because they're all rooted in 'blue'.

We can replace these with non-shared colour words to give more memorable
server names.
Merge pull request #2 from Govan/confusing-colours

Remove hard to remember colours