As you can imagine I have a lot of love for this particular shade, and since autumn is just around the corner this might be your shade of the upcoming season!
As usual first thing I'm going to do is get back to you on how much Mac's descriptions of the particular shade are correct. About Rebel Mac says: "Midtonal Cream Plum", I'd say it's slightly cooler tone, although I can see the where did they came from with the "midtonal". Rebel has a slightly glossy finish, what makes it a little more to describe whether it's cooler or warmer tone, so I presume they've tried to create a shade, which would work for both cool and warm skin tones. I believe Mac succeed in this one, I can't imagine anyone not being able to pull Rebel off!
Personally I'd say that Rebel is a cross between raspberry and plum, because it has that very strong sort of berryness to it (if that makes any sense). Besides being extremely pigmented it'll provide your lips with this absolutely stunning raspberry stain! Again, with all of those points being said I think Rebel is suitable for all skin tones, because it can be applied with finger ans sheered out for slight pop of colour of build up into the most gorgeous forest fruit shade you've ever seen!