@steve_podleski
You cannot add wind values to the wind vectors, but it is possible to customize the wind layer colors.
The solution is to choose a different color for each 5 mph range for instance. This is what has been done with the colors matching the Beaufort scale for the wind here:
https://community.windy.com/topic/7233/wind-colors-for-sailors-and-for-everyone?=1593840763745
Note that colors are not smoothed, not blended, and knowing your color choices you can identify the wind speed ranges e.g. the areas with a ...10-15 mph, 15-20 mph, 20-25 mph...wind, each range corresponding to a colour.
More info:
https://community.windy.com/topic/10336/customize-the-color-scales-of-windy-layers?=1593840763757