i bought a 6th gen cluster to put into my 5th gen, because i wanted white lettering and red needles. so now i've ran into the same problem
the 6th gen gauges have some blue tint behind the white lettering. that's why applying a white light to them makes them light up blue. seems to me that it's nearly impossible to get rid of. ain't that a pain in the ass?

if i figure anything out, i'll start a thread..
anyone know how to take the individual gauges apart? by that i mean, take the speedometer or odometer out of the cluster, and disassemble them...