The hex color #515D4B is a dark color. The web-safe version is Hex
#666633. A complementary color is
#AEA2B4. The grayscale version is
#535353. A 20% lighter version of the original color is
#84907E, and Hex
#1E2A18 is the 20% darker color. If the color is saturated by 10%, you get
#515E4A. If the color is desaturated by 10%, the color
#515C4C is obtained.