What colors print well in black and white?
A lighter color and a darker color will work better than two darker colors. You may also want to add a line around a shape with a lighter fill color so it is easier to see when printed in black and white.
What goes good with black and white?
You can't go wrong with adding gray to your black-and-white color scheme. As it's another neutral, gray is classic and timeless. But it can also feel modern and sophisticated. You can add any shade of gray to your color palette as it's so versatile and complementary.