The hex color #331AF3 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#CCE50C. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#664DFF, and Hex
#0000C0 is the 20% darker color. If the color is saturated by 10%, you get
#2D12FF. If the color is desaturated by 10%, the color
#3922E5 is obtained.