Dental porcelain crown on my front tooth turned blue. What should I do? (Photos)

Before cementing, I did notice micro leakage on original tooth, but the doctor said it was just staining. And the overall color of the tooth looked good after cementing. Now the blue stump has become more noticeable. I already inquired about bleaching the tooth or having something that would block the underlying color under crown, but doctor was not capable of doing any. Under natural lighting it looks fine, but it looks darkened under indoor lighting