The hex color #b10d5d is a dark color. The web-safe version is Hex
#990066. A complementary color is
#4EF2A2. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#E44090, and Hex
#7E002A is the 20% darker color. If the color is saturated by 10%, you get
#B9055D. If the color is desaturated by 10%, the color
#A9155D is obtained.