I bought a pair of blue/white side light bulbs for the Espace when I first got it because the standard ones looked so yellow next to the main Xenons. I gave up trying to swap them.
I think I discovered that you had to remove part of the front above the bumper but it seemed such a fanny. It's not just Renaults though, I remember when I had a V40 Volvo I had to get a mate to change the bulbs because I just couldn't get to them. That blew bulbs for fun, probably because the lights were constantly turned on