The hex color #603c69 is a dark color. The web-safe version is Hex
#663366. A complementary color is
#9FC396. The grayscale version is
#575757. A 20% lighter version of the original color is
#936F9C, and Hex
#2D0936 is the 20% darker color. If the color is saturated by 10%, you get
#61396B. If the color is desaturated by 10%, the color
#5F3F67 is obtained.