Is this really a serious question??
If you're really worried about how it will look, which I'm sure you do because you're getting 8,000K, then don't run with both of them on. Many of us run HIDs in the headlights and either stock fogs or yellow fogs like myself and there is no problem with them "clashing." Why are you going with 8,000K? They put out less light than 5,000 or 6,000K and just look like aftermarket blue lights to me. I would stick with 5,000K or 6,000K.
If you're really worried about how it will look, which I'm sure you do because you're getting 8,000K, then don't run with both of them on. Many of us run HIDs in the headlights and either stock fogs or yellow fogs like myself and there is no problem with them "clashing." Why are you going with 8,000K? They put out less light than 5,000 or 6,000K and just look like aftermarket blue lights to me. I would stick with 5,000K or 6,000K.