Regular way to encoding color in 32-bit uint? (RGBA? ARGB? BGRA?)

Question

A R/G/B/A color components can be encoded in a single uint value. But I'm confusing order of the each components. Of course, there is no law, but I want to know more regular or more compatible order to hardware acceleration API like OpenGL.

-- edit --

I'm asking about byte encoding order of each channels, not it's terms.

Answer 1

... And the winner is: RGBA.

ARGB is actually one that I've probably seen more often, but in terms of "support" or "performance" any of those will suffice. BGRA is somewhat less common, though.