The hex color #3f16c0 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C0E93F. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#7249F3, and Hex
#0C008D is the 20% darker color. If the color is saturated by 10%, you get
#3C0FCA. If the color is desaturated by 10%, the color
#421DB6 is obtained.