A mustard, rust ... curtains can have a more luxurious look -- especially if you are working with a sheer or semi-sheer textile. If you suffer from the seasonal blues, yellow is an uplifting color ...

Swap in warmer accents like rust-colored or burnt-orange pillows ... In summer, choose light-colored, sheer curtains to maintain a breezy and airy feel. As the weather cools, switch to warm ...