The hex color #3d3dda is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C2C225. The grayscale version is
#717171. A 20% lighter version of the original color is
#7070FF, and Hex
#0A0AA7 is the 20% darker color. If the color is saturated by 10%, you get
#3838E4. If the color is desaturated by 10%, the color
#4242D0 is obtained.