Yeah like Alex said with anything LED find out what bulb your looking at good website is Sylvanias guide here:
http://www.sylvania.com/ConsumerProd...de/default.htm
and get leds from a number of places superbrightleds, ebay, and even amazon. I got leds off amazon for cheap and they're identical to superbright LED's. Just convenient because it was cheaper and already have my payment account set up there.
As for color choice, I strongly do not recommend blue. That color is blinding and can be a huge distraction esp up in your eye sight. I have an AFR gage down under my stereo like the 1st gen cluster area and it blinds me, wish I went with red.
You should get red led's for the gages, get a 94-96 gage overlay from junkyard and scratch the blue paint off the back and install red led's in your stock cluster. WIN!
Edit: nvm thats what I'm doing don't copy :P
