The clock is the easiest part. The clock is a whiteish green color normally. It has a amber plate in front of it. All I did was get a piece of plastic like a laminate that covers like a drivers lisence or sumthing then I colored it with blue permanent marker. I taped it the top and bottom and now it glows blue.

The climate control is in no way as easy. There are three major light bulbs in the climate control. One bulb for temp and fan speed on the bottom, one for the a/c rear defog and recircutlate. The last bulb covers all the arrow faces buttons. You will have to get rid of the bulbs and the plastic light shineir blocks things. Led wont work where the lgiht is becasue leds basically just shine straight. You will have to build a actual little plate behing the top ones and the fan speed. The temp should just be a brighter bulb becasue it is nealery inpossible to recreate the red blue glow using leds. The bottoms on the left side and door are pretty easy. Just take out the bulbs and put an led in there and shave it down.

This is just basic I hope it helps give you an idea of what msut be done.