The hex color #3b11d0 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C4EE2F. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#6E44FF, and Hex
#08009D is the 20% darker color. If the color is saturated by 10%, you get
#3709DB. If the color is desaturated by 10%, the color
#3F19C5 is obtained.