I have to be careful with my web designs and make sure I run them by others to make sure they look okay, but they usually do. There are some special glasses made in Europe that are reported to help colorblind people distinguish colors better, but I'm not sure how they actually work. See an eye doctor if you are really concerned. Computer graphics online are not the best measure because the colors can vary a lot from one monitor to another. Check with an eye doctor to have a real exam.
Children have a hard time distinguishing colors until around age three.
At that point, they still may say the wrong colors as a joke. Anyway, it's not something that you can do anything about, just watch for it a little later on. It's not a seriously debilitating condition, it's just something that you deal with. I have and it involves people who were born colorblind in one eye and not in the other. I'll explain more about it here later.