Is color confinement detected?

I'm a graduate student studying QFT. I'm quite interested that is color confinement detected or proved? (both directly and indirectly) Or it is just an assumption?

-
I thought confinement was only detected. Isn't one of the millennium prizes to prove confinement? – Joe Joe Jan 19 '13 at 5:14
@Joe Joe: the prize is only for the mathematical standard of proof. The physics standard of "proof" is quite a bit lower. – Peter Shor Jan 19 '13 at 16:09

Strictly speaking, it is only predicted by $SU(3)$, not by the whole symmetry of the Standard Model. – Frederic Brünner Jan 19 '13 at 12:38
True, but the mechanism of confinement is specifically related to $SU(3).$ – Frederic Brünner Jan 19 '13 at 12:54