The hex color #34003c is a dark color. The web-safe version is Hex
#330033. A complementary color is
#CBFFC3. The grayscale version is
#252525. A 20% lighter version of the original color is
#67336F, and Hex
#010009 is the 20% darker color. If the color is saturated by 10%, you get
#35003E. If the color is desaturated by 10%, the color
#33043A is obtained.