It depends on the colors in your house and what you think goes with those colors. If I were you, I would probably use neutral colors such as black, beige, white- (if you live in a clean environment where it won't get stained), brown, etc.
overall it depends on the condition, design and materials used. If it was HAND MADE (vs machine made(, if it is made of wool rather than acrylic, if it is in good condition rather than worn, if the design is complicated or simple. In general, I would if it were hand crocheted, of 100% virgin wool or better (cashmere!), a pleasing design and in good condition, sure!
Two colors that look good together.
to me any bright colors will do
Complementary colors are colors that make one another look good. For example, red looks good with green. When used together, they create a better piece of art. On the other hand, orange and blue are non-complementary colors. If they are used together, they do not look as good as the complementary colors.
bleu and green
yes that will be very cute together
purple and blue
Blue and Orange
Yes they look good together. I am actually wearing those two colors write now !
Horse blankets come in a variety of colors, and the variety can often depend on what specific use the blanket has. For a basic turnout blanket (a blanket for outdoor use), you can have a variety of colors from red to blue to even fun patterns such as one with peace signs all over them. (http://www.statelinetack.com/blankets-and-sheets/waterproof-turnout-blankets-and-sheets/2324/) If you are looking for an indoor/inner layer stable blanket, there are fewer patterns, but the color variety is still pretty good with red, black, and blue all possible. (see http://www.statelinetack.com/blankets-and-sheets/stable-blankets-and-sheets/2322/)
sky BLue and brown
yes they are they make beautiful colours