The hex color #b840c9 is a dark color. The web-safe version is Hex
#CC33CC. A complementary color is
#47BF36. The grayscale version is
#969696. A 20% lighter version of the original color is
#EB73FC, and Hex
#850D96 is the 20% darker color. If the color is saturated by 10%, you get
#BB37CE. If the color is desaturated by 10%, the color
#B549C4 is obtained.