For something fragrant on the table, and not to mention fairly inexpensive and really easy: grab a bunch of pretty herbs, wrap them in ribbon or twine, thread a piece of paper with a name on it, and lay on a plate for an herb bouquet (I have no idea how they got this one to stand up – further proof of Martha’s magic powers).
This would go with most color combinations, and depending on the herbs could be more or less casual. Plus, did I mention easy?!