The problem is that it's really hard to keep a kitty in just blues. Cat's cycles are much flatter when they are seeing some greens. It can still be high greens. With Neko, I had to keep her nadirs in the 70's, or her bounces would be above renal threshold. That was became even more of a concern to me when her CKD was diagnosed. Kidney problems are common with acros and I wanted to take it as easy as I could on them. The internal medicine vets at Coloradu State University (where she had her SRT), told me the best thing I could do for her was maximize her time under renal threshold.
You'll hear some people elsewhere say that the acro blues are their greens, but I don't believe it. From what I've seen, keeping a little green in the SS also seems to help keep down the resistance. If nothing else, it helps prevent glucose toxicity from developing, which means an even higher dose.
If Bronx sees green, he would bounce the first time or maybe even the first several times, but he would get used to it eventually. Forcing Neko to "see the green" is what helped lower the height of her bounces.