You can most certainly screen for eye and hair color right now, there are only 10 or so genes involved in hair and eye color. They are very easy to detect using current PGD technology.
They are not easy to detect, and because there are multiple genes involved, the process is also very unreliable. Even testing for single gene disorders is a lot harder than testing for chromosome disorders or sex, and testing for hair and eye color would be a lot harder, requiring more cells to be plucked from the embryo, and thus more likelihood of irreparably damaging the embryo, and STILL quite unreliable. If it was easy, then plenty of clinics would already be offering it to patients who are having PGD done anyway for other reasons.
I’m sure technology will progress within the next few years to where this is practical, but it probably won’t be much longer beyond that before the desired genes can simply be swapped in for the existing ones. Just think: 2 dark-haired, brown-eyed parents can have blond, blue-eyed children who otherwise carry the parents’ genes. Yippee! Sounds like an excellent plan for separating complete idiots from their money. I can’t see it ever catching on widely.