The hex color #455f68 is a dark color. The web-safe version is Hex
#336666. A complementary color is
#BAA097. The grayscale version is
#595959. A 20% lighter version of the original color is
#78929B, and Hex
#122C35 is the 20% darker color. If the color is saturated by 10%, you get
#436069. If the color is desaturated by 10%, the color
#475E67 is obtained.