The hex color #0a66a7 is a dark color. The web-safe version is Hex
#006699. A complementary color is
#F59958. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#3D99DA, and Hex
#003374 is the 20% darker color. If the color is saturated by 10%, you get
#0267AE. If the color is desaturated by 10%, the color
#1265A0 is obtained.