Well, generally, we have duvets on the comforter, and a different duvet for every pair of sheets. For some reason, they're somewhat difficult to find, so we make our own by sewing together the flat sheet that comes in the sheet set with another flat sheet. We never use flat sheets anyway, so it works. So yes, I guess our sheets always match because we wash the duvet when we change the sheets and put on the new sheets. But it's not like we won't sleep on the sheets if they don't match. The other day, I took my duvet off and slept with just the comforter which is orange and pink (the sheets were aqua) because my friend was over and happened to get her monthly visitor on my duvet. Didn't bother me that my comforter didn't match my sheets, as long as I'm cozy, I'm happy.