Red, a classic that just can't be beat:

Orange, lively and warm:

Yellow, succulent and sweet:

Green, creative and unique:

(because seriously, I would go for a guy with the guts to get green flowers)
Blue, calm and serious:

Purple!, vibrant and vivacous:

For all you fans of indigo out there, I'm sorry but this blog does not officially recognise that as a color of the rainbow, it's a variation on blue.