From the little bit I've read so far I think 3000K might be a similar colour to the halogens, rather than the intense yellow of dedicated fog lights. Also, unless you rewire them to turn on separately from the regular high beams you will still have a flood of bright white 5000K light from the bi-xenon high beam generating glare in the fog anyway.
Only one way to find out for sure...
All the best.

