The hex color #0166ed is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#FE9912. The grayscale version is
#717171. A 20% lighter version of the original color is
#3499FF, and Hex
#0033BA is the 20% darker color. If the color is saturated by 10%, you get
#0065F9. If the color is desaturated by 10%, the color
#0C67E1 is obtained.