As you see the blue does work but the problem is that the blue bulbs i got are not strong enough to give a good spread of light. i'm asuming the orange coating on the back is a kind of filter to give an even spread of light. I'm thinking of trying the blue bulbs i had in the sidelights to see if theres a difference or i will add more bulbs across the dials to even it out. To start with i used bulb paint from halfords but even with a light coat the light coming through was very poor so i removed it and left the dials clear. Other problem which was my fault is the needles wont glow because i coated them as well and havent got round to removing it. Despit the pic the needles are visible at night so i aint driving without em.
The MG part of the dial wont glow but a wee led will sort that.