The hex color #3d293c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C2D6C3. The grayscale version is
#363636. A 20% lighter version of the original color is
#705C6F, and Hex
#0A0009 is the 20% darker color. If the color is saturated by 10%, you get
#3E283D. If the color is desaturated by 10%, the color
#3C2A3B is obtained.