@literakl
You are probably talking about Rain accumulation. And 1m (or 1000mm) is not a mistake as explained here:
https://community.windy.com/topic/12502/bad-simbology-units-on-accumulated-rain-layer?_=1620937956224
You are right, the pink colour corresponds to a very wide range from about 100mm up to 1000mm and much more. It can be changed fortunately as explained by same link above.