Another favorite color combination of mine is blue and red. I like a very light, almost ethereal blue with a brash pop of red but other tones and hues work just as well too.
I like the contrast between them — with blue being calm, peaceful and even moody and red being strong, confident and bold. I am still sometimes surprised by how well they can go together.
(Images:1 Venice Beach Eco Cottages, 2 Tim Corrigan, 3 Elizabeth Dunker via Design*Sponge, 4 Ideal Home, 5 Stylish Thought)