I have exactly this. It’s normal and healthy. It’s not related to tiredness diet exercise etc it’s just the natural way the flesh around my eyes looks. But I do use concealer!
I used fo use MAC full coverage cream concealer which was perfect but I would no longer recommend it because it now says “SPF 35” so it will probably sting if you put it near your eyes.
I’ve used Bobbi Brown corrector + concealer which are good but takes slightly longer to apply and doesn’t cover it quite as well.
I’ve got MAC pro longwear concealer which really works and doesn’t crease like the cream, doesn’t need powder, I’d say it works the best. BUT it’s in a pump bottle which always dispenses far too much every time you use it even if you push it carefully. So annoying!
You could also use benefit lemon aid with a bit of full coverage cream concealer on top, I used to use that but don’t know if they still make it.
Basically you want long wear and full coverage. You only need to use a tiny amount to cover the blue areas. Apply with a brush and don’t thin it out too much when blending you need the concealer to sit there and cover the blue.
Sorry to the PP who says touché eclat, don’t bother it’s like twinkly tinted moisturiser and it will do zero for the blue. Lovely but not for actual dark circles. I’ve wasted my money so you don’t have to.