How to correct the black line on the eyes that has turned blue ?

The black pigment is a color composed with blue . To neutralize the blue , just add the stop grey/blue to your black pigment to help him stabilize.

NOTE : There is on the market , organique pigments very liquid composed with carbon powder so that the color stays black . But there is a very high risk to obtain a dispersion of the pigment in the skin ,while applying. After its very hard to correct.