I'm a newbie reefer, and just purchased my first Brute 32g can like the one mentioned by the OP, except I got the blue version. I saw some comments online that said that only certain colors (like white, gray, yellow) were considered food safe, but I just checked the markings on the bottom of my blue Brute and I see the wine glass & fork symbol, which is the international symbol that something is food safe!
Regarding the anecdotal comments about some Brute colors being not food safe, I can only speculate that maybe some of the older cans were a different formulation. Maybe someone here knows for sure.