The hex color #31043c is a dark color. The web-safe version is Hex
#330033. A complementary color is
#CEFBC3. The grayscale version is
#262626. A 20% lighter version of the original color is
#64376F, and Hex
#000009 is the 20% darker color. If the color is saturated by 10%, you get
#32013E. If the color is desaturated by 10%, the color
#30073A is obtained.