How many cubes are painted with red or blue?

Here on each face 6 x 6 = 36 cubes that are painted with one colour.
Case (i): When red and blue are adjacent to each other then from one face we will get 6 x 6 = 36 cubes but out of them 6 cubes from common edge is common so number of cubes are 2 x 6 x 6 - 6 = 66
Case (ii): When red and blue are opposite to each other then required number of cubes is 2 x 6 x 6 = 72