The hex color #3d302e is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2CFD1. The grayscale version is
#343434. A 20% lighter version of the original color is
#706361, and Hex
#0A0000 is the 20% darker color. If the color is saturated by 10%, you get
#3E302D. If the color is desaturated by 10%, the color
#3C302F is obtained.