Is there a particular reason why high pressure is colored orange and low pressure is colored blue on the maps? This site has become an excellent teaching tool for my middle school students, but the coloring is confusing students. On a standard weather map low pressure is noted with a red L and high pressure a blue H. Is it possible to make the low pressure areas orange and the high pressure areas blue?
You are right the WMO color standard is blue for high pressures and red for low pressures. But I definitively prefer the opposite. Anticyclonic conditions in summer bringing hot weather are better figured out in red. And Lows in blue.
Anyway as @Korina said, you can change the colors of the Pressure layer as you like. Here is an article which can help you: