This dead tooth (top right) looks pretty blue to me: https://tracewellness.com/what-does-dead-tooth-look-like/ https://tracewellness.com/what-does-dead-tooth-lo

This dead tooth (top right) looks pretty blue to me: https://tracewellness.com/what-does-dead-tooth-look-like/ https://tracewellness.com/what-does-dead-tooth-look-like/ (careful, you might not like to see these images).