Rich, you're going colorblind.
Haha just messing with ya.
Those API color charts are a bit hard to tell sometimes. Off the top of my head I believe the lower range/basic pH range colors can be a little confusing as the test liquid doesn't quite match a pH chart color, a lot of the bluish-greens look similar and the test liquid can be a close to the color chart, but a different shade if that makes sense, like the color chart is faded in a way. More so with the nitrate test, particularly if you are testing in the red range, the reds can be tough to tell apart and my eyes have perfectly good vision.