From ASM's website:
Colour chart. .
A pic and scan of my chips:
The $1 is blue with imperial blue and grey edgespots;
The $500 is lavender with purple and pink edgespots.
Imperial blue is brighter, almost a sky blue, than than blue. Lavender and purple are quite different.

Do you know about Poker Chip Factory here? The colours are decent. Go to Site Tools>Poker Chip Factory.
Also, if you want more examples of colours, the Gallery is a good place to browse.