It just indicates using a colour for wind speed such as blue for single digits, green double digit teens, orange in the 20's and so on. The darker each colour gets means the higher the speed is within that colour range before adjusting to the next wind speed range. Notice Windfinder and SailFlow uses the same colour sceme for wind and gust speeds.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.