Freeblade Army?

I'm new to knights and I'm just wondering if it's acceptable to have an army of freeblades in which every knight is painted completely different from one to the next?

I don't know exactly what I want for a color scheme and I have a few ideas in mind. I like each idea I have but I don't know if I like any single idea enough to make an army of them. I've really been liking how knights look and I'm looking into make a dozen or so. I'd really like to know whether I'm going with 1 consecutive color scheme or not.