Here's one I created for the Moxie Fab Gallon/Quart/Pint Challenge. I bought this ribbon at a fair recently, but had no particular project in mind (other than a burning need to get out the acetate again). Then when I read up on the concept of designing in thirds, I knew this ribbon was my starting point - with the colours apricot, brown and pink being my 'thirds'.
Brown is a favorite of mine, as it can pull so many colours together, so that is my Gallon (you could argue it's a neutral and therefore doesn't count as one of the thirds, but in this case I think the neutral is white and the brown becomes a feature). I chose to bring out the apricot as my Quart (I get a bit tired of pink with two little girls under 5!) so I added a strip of apricot, stitched to help tie in the fabric texture of the ribbon with the card. The pink then becomes my Pint.