User blog comment:American che/The Genetics Behind Phineas and Ferb (actually quite interesting)/@comment-1480096-20100311121849

I like my character's hair color just the way he is! You shall not change it! They do have a brown haired gene on Candace's side. Lawrence has brown hair. But the wierd thing is, Ferb has green. So Ferb's mom must of had green hair. Otherwise, Jeff and Swampy probably were just being creative. There's no fun in not being creative.