The hex color #515f3a is a dark color. The web-safe version is Hex
#666633. A complementary color is
#AEA0C5. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#84926D, and Hex
#1E2C07 is the 20% darker color. If the color is saturated by 10%, you get
#516138. If the color is desaturated by 10%, the color
#515D3C is obtained.