The hex color #3d2fd8 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C2D027. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#7062FF, and Hex
#0A00A5 is the 20% darker color. If the color is saturated by 10%, you get
#3829E3. If the color is desaturated by 10%, the color
#4235CD is obtained.