I note that in most pix, the front foglamps look a bit "warm". The temptation might be to switch them to something whiter but that actually makes them less effective as true foglamps. Whatever path you pursue, they are PSX24W also known as Philips 2504.
IMO, a real yellow is best for actual FOG whereas a brighter is best for a balanced look up front. The OEM warm white serves neither course.