Mine is green. I now have 6,000 miles and seem to be averaging about 1 mpg better than my Ford. One impressive thing I've learned is these have super heavy differential for a 1/2 ton. I think the rear is a 10.75" ring gear in a third-member. I haven't climbed under the front to see if it's a third-member but I've read the front is I believe a 9". The rear is the equivalent of a Dana 70 or 14 bolt at least in ring gear size.
I am also a Tundra owner. A 2017 with 5.7. First and only owner.
I wouldn't put too much faith in the ring size or comparison to old diffs. The Tundra is a good 1/2-ton truck, but I wouldn't get too caught up in the various claims. The one that cracks me up the most is the rear diff ratio. This doesn't mean much unless you consider the transmission and transfer case ratios, however dudes like to compare it to the the 3.73 or 4.10 ratios of years past. This is silly.
