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I've been working on a learning app about subatomic particles for some time, and now we'd need to represent gluons.

I want to do this correctly by representing the eight possible gluons in the octet, but don't really know how to read the name of a gluon.

I know that, for example, (red-antiblue + blue-antired)/sqrt2 has a 50/50 probability of being either red-antiblue or blue-antired. That is if I understood correctly.

But for gluons which have a minus sign instead of a plus, is it still 50/50?

And for those with a minus i in front of? Like -i(red-antiblue - blue-antired)/sqrt2, how do you calculate the probabilities of it being red-antiblue or blue-antired?

And finally (red-antired + green-antigreen - 2blue-antiblue)/sqrt6, what's the color charge probability for it?

Thanks for your help!