You can customize the pressure and humidity temperature ranges and colors on Windy to suit your interest. Near the bottom of the settings, click the button Modify Layer Colors. A pull down menu will display. Just choose the Preasure layer which should look like: You can choose your preferred ranges, add or remove ranges and select any color you want to assign to any range. I have tried changing many of the customizations and when I mess things up beyond repair, there is the Load Defaults button on the bottom. Enjoy.