@judihui
Hi,
You can change yourself the color scale of Wind.
Go to Settings -> Customize color scale.
See for more details:
https://community.windy.com/topic/10336/customize-the-color-scales-of-windy-layers?_=1671364219776
BTW this color scale showing wind speed has nothing to do with the Orographic Model which is the way how the Weather Model is smoothing the terrain.
https://confluence.ecmwf.int/plugins/servlet/mobile?contentId=131397338#content/view/131397338