That is a stunning watch. All I know about Wakmanns is that there was some connection with Breitling. I did a "Google" search on found the same model that had gone tropical as well, and looks like your watch. My vote is your watch is a tropical dial and not a unique color.
Also a good article that explains tropical dials... worth a quick read.
Here are the links to both sites:
https://www.gearpatrol.com/watches/a569036/found-vintage-wakmann-chronograph-watches/
Wakmann Tropical Chronograph
What We Like: Some collectors are really into dials that have aged to take on a “tropical chocolate” look like this one — that doesn’t mean they have melted, but rather have developed a rich brown hue, often from prolonged exposure to sun. This particular watch features a highly wearable 37mm case and is powered by a manually wound Swiss chronograph movement.
From the Seller: Case in great condition, no blemishes.
Tropical Dials Explained:
https://www.ablogtowatch.com/tropical-dials-explained-by-a-vintage-watch-restoration-expert/Click to expand...