mechanical keyboards changing leds

EEG SEXTANT

Honorable
Feb 9, 2014
108
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10,690
alright so i have never done something like this before but iam pretty sure i know what iam doing with the soldering stuff the thing i dont know is which size the leds should be and can i use any color and can i have different brand on my switches
 

EEG SEXTANT

Honorable
Feb 9, 2014
108
0
10,690
alright so i've found some things that ineeded to know pretty much everything only one thing i cant figure out is what volt my leds are on my keyboard atm i've been looking on the links but nothing :/