@dronepanora
As an alternative you can also customise your color scale by changing directly the code itself.
Click on [view code].
You get that with the example shown by @Wheats
[[1.5,[134,163,171]],
[2.5,[126,152,188,256]],
[4.12,[110,143,208,256]],
[4.63,[110,143,208,256]],
[6.17,[15,147,167,256]],
[7.72,[15,147,167,256]],
[9.26,[57,163,57,256]],
[10.29,[57,163,57,256]],
[11.83,[194,134,62,256]],
[13.37,[194,134,63,256]],
[14.92,[211,88,39,256]],
[16.46,[211,88,39,256]],
[18,[220,0,30,256]],
[20.06,[220,0,30,256]],
[21.6,[175,80,136]],
[23.66,[175,80,136]],
[25.21,[117,74,147]],
[27.78,[117,74,147]],
[29.32,[68,105,141,256]],
[31.89,[68,105,141]],
[33.44,[194,251,119,256]],
[42.18,[194,251,119,256]],
[43.72,[241,255,109,256]],
[48.87,[241,255,109,256]],
[50.41,[256,256,256,256]],
[57.61,[256,256,256,256]],
[59.16,[0,256,256,256]],
[68.93,[0,256,256,256]],
[69.44,[256,37,256,256]]]
On each line the first number is the wind speed in meter per second m/s. So you probably need to make a conversion in m/s.
Then 3 numbers are the RGB code, the last one 256 has no real meaning.
So you can make all the changes after copying the code in a text software like Word.
Then paste it in the code window.
Click on [import]
And finally Save