Thanks, Diamond! Blue and purple together is a very good idea! And I have the same label favorite as you.
The client I did the commission for just asked me for a second map, so I'll be taking another break here But one more update first. I colored the water, tinted the coasts and riverbanks yellow to increase the contrast there, and toned the mountains a bit more green. Also experimented some more with the text, lowering the opacity of it.