I certainly like that shade of green better than TMgreen and wouldn't mind seeing usaib and the E routes switch to that, though I'm not sure about that color scheme overall. The thing with lightsalmon is that it's not exactly easy to see, which is the hard thing with replacing brown for the state route color; it's hard to find something that's both easy to see and isn't obnoxious. Clinched lightsalmon and unclinched red look particularly close, which is particlarly notable if you look at my map of NJ rendered
as if it was not in North America.
(this is where I wish we had spoiler tags, but here's the hint if you didn't notice it: I've clinched NJ 55, but who can tell with those colors?)
The easiest way to sidestep this would be to do usanp, usanyp, usaush, and usatr as that darker green even though it would be inconsistent with the rest of the world. Parks and scenic byways are already often colored such on maps, so it's not a stretch for them, though it would be weird for usaush.
Is there a list of already defined colors available somewhere so we can experiment? I could have sworn there was but I don't remember where.