But I remember the 35mm of Begins having the same pushed browns and teals, the Blu-ray has too many/too varying colors. I'm thinking of the scene where Bruce confronts Ducard in Wayne Manor, the DVD/Blu show lower contrast and lots of varying colors, but the IMAX was all pushed gold and brown and high contrast and that's what I remember from 2005. (I actually had not watched the film since the original theatrical run back in '05, so all my color memories were what I still remembered from seeing it in the theater.)
Not trying to say you're wrong, but I just remember a distinct color palette, and the IMAX seemed to match up with my 35mm memories.