The hex color #3166bb is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#CE9944. The grayscale version is
#717171. A 20% lighter version of the original color is
#6499EE, and Hex
#003388 is the 20% darker color. If the color is saturated by 10%, you get
#2B65C2. If the color is desaturated by 10%, the color
#3767B4 is obtained.