Customising colours of surround channels

I love the option to individually colour surround channels when viewing them in the waveform editor mode.

However, I can't seem to find a way to configure which colour I'd like mapped to each channel.  For example, in a 5.1 setup, it's arranged this way:

L = Green, R = Blue, C = Orange, LFE = Pink, Ls = Purple, Rs = Cyan

If, for example, I wanted to change the center channel colour to Yellow...is this configurable -- or are these set this way without any ability to configure?

If we're not able to configure them, can this be added as a feature request?