https://developers.google.com/kml/documentation/kmlreference
根据:
https ://developers.google.com/kml/documentation/kmlreference#color
表达顺序为aabbggrr
<color>
Color and opacity (alpha) values are expressed in hexadecimal notation. The range of values for any one color
is 0 to 255 (00 to ff). For alpha, 00 is fully transparent and ff is fully opaque. The order of expression is
aabbggrr, where aa=alpha (00 to ff); bb=blue (00 to ff); gg=green (00 to ff); rr=red (00 to ff). For example,
if you want to apply a blue color with 50 percent opacity to an overlay, you would specify the following:
<color>7fff0000</color>, where alpha=0x7f, blue=0xff, green=0x00, and red=0x00.
请参阅此颜色选择器:
http ://www.zonums.com/gmaps/kml_color/