The hex color #3f33d2 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C0CC2D. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#7266FF, and Hex
#0C009F is the 20% darker color. If the color is saturated by 10%, you get
#3B2DDC. If the color is desaturated by 10%, the color
#4439C8 is obtained.