The hex color #45515e is a dark color. The web-safe version is Hex
#336666. A complementary color is
#BAAEA1. The grayscale version is
#515151. A 20% lighter version of the original color is
#788491, and Hex
#121E2B is the 20% darker color. If the color is saturated by 10%, you get
#44515F. If the color is desaturated by 10%, the color
#46515D is obtained.