[pitch symbols colours?]

Hello everyone! 

when you do this:

(vector-to-pitch '(g3 g4) (gen-white-noise 10 :seed 89))

 

you get the pithces in two different colours, why is that?

 

=> (ab3 g4 eb4 a3 b3 eb4 g4 g3 gb4 e4)

 

Thanks,

Julio

(not sure the colours will show up on this post, but I think you know what I mean...?)