dark green and white or yellow and blue
white and green
green and gray
The two colors are blue and green.
Blue and yellow are mixed to make green.
Blue and yellow make the color green.
Brown
They can be several colors, depending on the species. Most are green when growing, and turn yellow/green when ripe. The inside of a ripe pineapple is yellow.
Green
The Christmas trees are green.
Green and white.
If you start with 2 colors you can make many hues of one color from them. For example, blue and yellow can only make different hues of green. But you can differentiate yellow-green anf blue-green from them.