The hex color #b645c0 is a dark color. The web-safe version is Hex
#CC33CC. A complementary color is
#49BA3F. The grayscale version is
#949494. A 20% lighter version of the original color is
#E978F3, and Hex
#83128D is the 20% darker color. If the color is saturated by 10%, you get
#B93DC4. If the color is desaturated by 10%, the color
#B34DBC is obtained.