Any Colour You Like is also a deeper, more complex song. That's why it is the B-side to their most commercial release, Money, because it's one of their most challenging songs. Like how Strawberry Fields Forever was the second side to Penny Lane.
Isn't it a fairly straightforward jam on a two-chord progression?
I like it a lot, but I have no idea why you would consider it complex or challenging. Money might be more sophisticated simply by virtue of being in 7/4
Notes have meaning in and of themselves
To suggest otherwise is basically saying music is a lesser artform that must be about something OTHER than itself to have value