The hex color #3f16a6 is a dark color. The web-safe version is Hex
#330099. A complementary color is
#C0E959. The grayscale version is
#545454. A 20% lighter version of the original color is
#7249D9, and Hex
#0C0073 is the 20% darker color. If the color is saturated by 10%, you get
#3D10AE. If the color is desaturated by 10%, the color
#411C9E is obtained.