tbh they're a bit too blue - coz our oem xenons are yellowy white instead of bluey white. that's coz the diamond vision are ~5000k and the oem xenons are only ~4300k.
that's why if i can find some xenon bulbs that are 5000k that don't cost too much then i'd probably change them too....
for those who don't know what i'm talking abt, the k is the temperature of the bulbs (kelvin) and the higher it is, the more blue/purple so 5000k is white with a tinge of blue, 6000k is blue white and 8000k is blue, 12000+ etc is purple while 4000 is yellowy white and 3000k is pretty much yellow. beware that generally the higher the kelvin, the less the light output.
that's why oem is usually ~4300k as that has been found to be best light output. however i like my lights to be more white than yellow. so that's why i'm changing bulbs around as the stock ones are all a bit yellow for my liking
edit: here's a pic that might show more accurately what each of these lights look like:
notice how the fogs are a little bit more blue than the xenons...and the LED's are an all right match with the xenons - but if u look close they have a slight blue tinge to them so they're a little off.
for those who want bluer LED's - maybe get the COOL WHITE
and btw, it's said that yellower fogs light fog up better than white lights as ur effectively shining white lights onto white fog which is not v.effective. i just changed the lights coz i think it matches the xenons better and i don't like yellow-ish lights. and there's hardly any fog in melbourne anyway unless ur out really late at night or really early in the morning in winter.