had forgotten about that... some quality colour schemes there... 
Some more colour inspiration from 1960s sources: first, some toys - large one by Herts Plastic Mouldings, small ones by Cherilea (picture scanned from Howe, Stammers & Walker
Doctor Who: The Sixties).

Next,
The Daleks comic strip in
TV Century 21.

(script by David Whitaker, art by Richard Jennings - note that we now have "Menoid" to add to Mechon, Mechonoid and Mechanoid as possible names for these things)

(script by David Whitaker, art by Ron Turner)
Finally, the only other 1960s appearance I can think of, from
The Dalek World. This isn't in colour, but does add the mystery of those little bug things, which are unexplained in the story (NB this was published well before Gerry Davis devised the Cybermats).

(script by David Whitaker, art by one of J Woods, AB Cornwell or W Wiggins)