The hex color #3f23ab is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C0DC54. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#7256DE, and Hex
#0C0078 is the 20% darker color. If the color is saturated by 10%, you get
#3C1EB3. If the color is desaturated by 10%, the color
#4228A3 is obtained.