I think that being color blind 'could' present a problem, but then again, it might all have to do with where one works, and what one actually works on.
I have actually worked with several people in retouching that were partially color blind, and they did 'O.K.', not really spectacular, but they did fine.
Retouching's supposed to be done by numbers anyway, not a monitor, plus, you do have printers that will differ slightly from the numbers, and most
images are redone to death by either the customer, or just to get them closer before they're sent out to the customer.
Most people I worked with used both the numbers and the monitor, but, we were in no way ever to use 'just the monitor', but I know some that did.
I know you aren't wanting to get into that, but I figured I'd mention it anyway, but you'd probably be doing 'some' color correction along the way.
As far as design goes, that 'might be' a problem, but like I said, it all depends on what you do, and who you work for, some places are better/worse
than others, and so are some jobs that come in.
I have never heard anyone with color blindness say they had problems getting a job though, not that there were many, but design being what it is,
it can definitely have setbacks due to colors not matching the way certain customers see it, and they can be very picky sometimes.
I'm definitely not trying to scare you away from what you want though, I'd say that you'd probably be fine, if you're good, then that's the main thing,
if you're not, AND have color blindness, then that's an altogether different problem.
Creating and selling something to the customer is the main thing, and while you may not see what the costumer sees, or your boss, the way it usually
works is that they'll mark up the proof that was sent out.
Using that proof, it'll say something to the effect of, "- mag slightly", "contrast more", etc., they pretty much tell you what 'they see'.
If for instance it said, "- mag slightly", all you'd have to do is alter it to using readings in INFO, (Photoshop) 'cause really, that's the way it should be
done anyway. (There's more to it than that, but that's the usual way it can go)
I worked in five companies as a retoucher and a designer, they were all alike when it comes to color.
I have seen as little as one 'turn around' on proofs sent out, to as much as fifteen proofs, it mostly all comes down to where you work, what customer
it is, and the people above you that make decisions.
If you see blue, and they see blueish green, I kind'a doubt that'd blow your cover, we all see something for the most part that is slightly different.
I would keep on your present course, and maybe ask around people that you've met at class, or teachers, now'd be the time to get answers from
people who are are either teaching the course, or learning it as you are.
If you're good at what you do, besides color blindness, it'll show, and if you are, I wouldn't worry at all, I worked with many, many people that didn't
know what they were doing, (retouchers) and usually they came up from the ranks, and they'd been there so long, they just blended in.
Most of the designers I knew were all pretty good though, if you have creativity, it'll come out, you can't hide when you're a designer, but you can
always float through life if you're a retoucher.
(These are my personal thoughts in jobs I worked at, not all retouchers are this way, but, I thought it important to tell it like I saw)
Oh yeah, I have only had to take one test, and that was for retouching, and all it consisted of was a verbal one, and I was asked what I would do
to fix a certain image, I have known people that had to take tests, but usually you're either referred to that place from a friend, or you're known in
the field, so your reputation may precede you, good or bad.
I have definitely never heard of a color blindness test, although, somewhere, I'm sure someone has, but I don't think it's widespread.
Randy