Real analysis is very orange, but it comes in different flavors. For example, measure theory is more of a rusty orange, deeper.
Complex analysis is a vibrant purple.
Algebra seems like a rather pure but a little lightened blue. But strangely enough ring theory is very red to me. Groups are a light blue and fields are a deep blue. Modules are sort of yellow, but the sort of yellow some people might confuse for green. Vector spaces are just green.
N is middle blue, Z is red, Q is dark red, R is orange, and C is a kind of indigo - between blue and purple (as you might expect).
How about goemetry? Just topology is kind of lavender, and with every derivative you add your object becomes darker and darker. Smooth manifolds are a mid-level purple. Manifolds with complex structure are a beautiful, royal purple - so are the many other nice manifolds. Lie groups and lie algebras kind of stray though, they're a dark olive / forest green respectively.
