Though Wikipedia won't tell you this, "Lavender's Blue," the old English folk song, was the original "[You Say Tomato, I Say To-mah-to,] Let's Call the Whole Thing Off."  "Lavender's blue, dilly dilly, lavender's green."  Only in the folk song, they don't call the whole thing off just because they can't agree about the color of lavender.  Interestingly, the lyrics in the 1670s version began with the colors the other way around: "Lavender's green, diddle, diddle, lavender's blue," so the first rhyme used to be about "you" and not a once or future "queen."