Strong color(red) for strong wind
Currently the color for 60kt range wind speed is a light blue color(can't say the exact color). But it would be better if you used a different color shade. Maybe a stronger red color would be more apt. Because the 60kt and 5kt seem to have almost identical colors and it's hard to distinguish just by looking at the map.
You can customise the colour range according to your need as explained here: