Guy's just a quick note, blue is the not the best colour for dash illumination. It's actually the worst to see at night, your eyes are the most sensitive to the colour blue and the least sensitive to red. It has to do with the colour spectrum.
Look at this image, which colour "burns" your eyes? Red or blue?
http://www.nissanpatrol.com.au/forum...2014/07/44.jpg
Basically any colour which are close to red in the spectrum are easier to see at night e.g. orange which is why Nissan (and BMW) used orange colour for the dash. That's why they use orange colour street lighting on freeways as it's calming on the eyes (at night) compared to cool white lighting.