That chart has some good general info, but it isn't perfect, and can give the mistaken impression that some pellets aren't good when they're actually just fine. It also isn't entirely up to date. Sherwood has since changed their formula for the adult pellets, to grass based(used to have alfalfa). Sherwood pellets are perfectly fine to feed, and in my opinion one of the best and most natural rabbit pellets out there.
I'll also add, just because some levels in the chart are red, it doesn't necessarily make the pellets a bad one to feed. The most important points for a good rabbit pellet are high fiber, lower carb, protein that isn't too high(for adult pet rabbits, higher protein is fine for young, old, or nursing rabbits that need the higher nutrient content), and calcium that isn't too high. Oxbow and sherwood are both good quality rabbit pellets, in my opinion.