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MAC Dubonnet is a "deepened claret" amplified creme finish lipstick (source). Dubonnet is a gorgeous darkened red with slight brown undertones that can veer on vampy depending on skintone and personal preference.
(L-R) MAC Dubonnet, Maybelline Timeless Crimson
1) Maybelline Superstay 14H in Timeless Crimson ($9) - Dubonnet is slightly redder and shinier than Timeless Crimson but they feel and look identical on the lips. Timeless Crimson is longer wearing but strongly fragranced (somewhat like Carmex).