complementary
US /ˌkɑːm.pləˈmen.t̬ɚ.i/
UK /ˌkɑːm.pləˈmen.t̬ɚ.i/

1.
complementare
combining in such a way as to enhance or emphasize each other's qualities
:
•
The two colors are complementary and look great together.
I due colori sono complementari e stanno benissimo insieme.
•
Their skills are complementary, making them a strong team.
Le loro abilità sono complementari, rendendoli una squadra forte.