The hex color #510b3e is a dark color. The web-safe version is Hex
#660033. A complementary color is
#AEF4C1. The grayscale version is
#333333. A 20% lighter version of the original color is
#843E71, and Hex
#1E000B is the 20% darker color. If the color is saturated by 10%, you get
#54073F. If the color is desaturated by 10%, the color
#4E0F3D is obtained.