One of the best ways to mix up your basics (and add a bit of interest to your outfit) is to add a clashing color. My new favorite combination is a to pair a rich burgundy with orchid and turquoise.
This combo is a great way to transition into fall. Keep your summery orchid jeans and tone it down with a burgundy shirt (the Hepburn shirt in Journey into Night would be perfect). Or try out some surprisingly versatile burgundy jeans with an orchid top (try the Hepburn in Break of Hearts) for monochromatic perfection.
Top the ensemble with a turquoise scarf, statement necklace or some arm candy and... voila! A no fuss update with items that are probably already in your closet.