Phil,
It's still Spring, the time of new growth and vitality, and depite Flug trying to put a damper on in your idea, I recommend that you go for it young man, but don't conform - you never have done I reckon - have your dreds tinted, not a single tone for each, far from it, have red, white and blue...done artistically, you could have the most patriotic mop in town, and when you run, the Union Jack would be flying proudly in the breeze.