I love the idea of using sheets and even thrift-shop clothing items to decorate with. Saw a great article on this type of thing.
The decorator had used a plaid theme. The plaids didn’t match, but were the same basic tones (red, green, white, a little bit of blue). She made curtains of one plaid, pillows of two other plaids, and accessorized by gluing plaid fabrics on things like the waste basket, lamp shades, etc.
Table runner, placemats etc. were bought at a dollar store.
The whole effect was very pleasing (and not as “busy-looking” as one might expect)…it made for a cozy reading corner or den.