The best replacement for colours is colors.

The best alternatives to colours are rated as following:
★★★★★  colors
★  flavours
★  shapes
  16m
  dark colours
  4 colours
  colours
  regular hair colours
  cool colours

Your alternative for colours is not listed? Suggest!
Speaking about colours, one probably shouldn't forget about pictures for kids.

Other search terms related to colours and their ratings are:
★★★★★ pictures for kids
★★★ ammonia
★ feelings
You have in mind a companion for colours and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of colours in all years. Click on graph for more.
colours
colors
flavours