The hex color #c3437f is a dark color. The web-safe version is Hex
#CC3366. A complementary color is
#3CBC80. The grayscale version is
#828282. A 20% lighter version of the original color is
#F676B2, and Hex
#90104C is the 20% darker color. If the color is saturated by 10%, you get
#CA3D7F. If the color is desaturated by 10%, the color
#BC497F is obtained.