The hex color #3d2783 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C2D87C. The grayscale version is
#4D4D4D. A 20% lighter version of the original color is
#705AB6, and Hex
#0A0050 is the 20% darker color. If the color is saturated by 10%, you get
#3B2388. If the color is desaturated by 10%, the color
#3F2B7E is obtained.