complementary

täydennys-, komplementaarinen

vastakkainen

vastaväri Acting as a complement.
(quote-book)

Using the terminology we intro-duced earlier, we might then say that black and white squares are in comple-mentary distribution on a chess-board. By this we mean two things: firstly, black squares and white squares occupy different positions on the board: and secondly, the black and white squares complement each other in the sense that the black squares together with the white squares comprise the total set of 64 squares found on the board (i.e. there is no square on the board which is not either black or white).

(rfquotek)