The hex color #454e5e is a dark color. The web-safe version is Hex
#336666. A complementary color is
#BAB1A1. The grayscale version is
#505050. A 20% lighter version of the original color is
#788191, and Hex
#121B2B is the 20% darker color. If the color is saturated by 10%, you get
#444E5F. If the color is desaturated by 10%, the color
#464E5D is obtained.