Veneer colors don't match - can this be corrected? (photos)

As far as I see from photos, it's not worth it to replace. They look quite good and acceptable in terms of shape, color, anatomy in all of 3 photos.

Hello! Custom shade matching with the right lab can get you a more accurate match. This can take a few attempts even with a great lab. This is my personal opinion and not a diagnosis or medical advise.

It does appear that there may be a slight color discrepancy between the two front veneers and the adjacent veneers. Color matching for veneers can be challenging, especially if the procedure has been complex due to bite alignment issues. Lighting conditions can also influence how the color appears.
If you’re unhappy with the current color match, consulting with a different dentist who specializes in cosmetic dentistry and has extensive experience in veneer color matching could help. A skilled cosmetic dentist can work closely with a high-quality dental lab to achieve a more harmonious color blend that complements the adjacent veneers.
Redoing the veneers could be worthwhile if the color difference bothers you, as advanced shade-matching techniques and more precise lab collaboration can yield a better result. During your consultation, you may also consider requesting a try-in of the veneers before final placement to ensure satisfaction with the color.

At the beginning of the zirconium crown treatment, usually dentist determine a color depending on the other teeth and sometimes ask the patient. Therefore, the other teeth can be cleanen and bleached, or the current zirconium crowns can be replaced with a color matching the other teeth.
All indications given are estimated and can be changed after the physical examination and x-ray.