Cosmetic Dentistry: BL4/bl3/B1 (Photo)

Hi. I’ve been going through some dental restoration all upper teeth. I’m having trouble with shade. The dentist suggests B1. We agreed on BL3 with some blue staining. I’m 30 and a bit of a pale guy so figured lighter might be better? Temps were B1 BL3 can seem very bright. I guess it’s all down to lighting but it’s got me considering BL4? I can’t find examples of BL4 My worry is finding a balance between too white and nice white Thanks