^^^No, yellow was in one video. Sith Warrior if I am not mistaken.
Also I have seen a sort of teal/cyan (a blue-green) in hilt illustrations, though it is entirely possible they aren't using that anymore, even though it was the first "blue" we ever saw in ANH. If Bioware used it previously then I suppose I could see Uncle George letting it slide but scoffing and scowling all the while.
While I understand they are going to limit colors for gameplay sake, so long as there isn't any absolute alignment-to-color restrictions, that would be okay with me. If I could be a sith with a green simply because I felt like it, I should be able to do that.
"I wasn't counting cards, I was cheating."
"Ugh. you give me hives."
"It's Tee-revor time!!!"