[sdiy] Blue LEDs: A simple swap, or otherwise?

[Julian]

Hi there,

A friend has asked me if i could replace the red leds on his tr-606 for
blue.

Is the higher current drain of the blues a point to consider, or is it just
a simple swap?

If its a simple swap, is there any case where it wouldnt be?

Plus, am i missing the point with this blue led 'craze'?  Why so much
interest in a different colour?

(yeah, i know theyre brighter, and open up full colour led displays etc.etc
but for musical equipment?)

Thankyou,

Julian