I'd say red, orange, yellow, green, blue, violet, black, white, and any combination of those eight. :)

'Traditional', even for quilts, is also often location specific. I imagine traditional quilts in Australia are vastly different than traditional quilts here in the northeast corner of the US which are quite different than traditional quilts in the UK despite the close common heritage of all three areas.

When I think of traditional, I think of log cabin, Sunbonnet Sue, drunkards path, double Irish Chain and a few other blocks that have been around forever. And more of a calico variety of fabrics.