The hex color #503fcc is a dark color. The web-safe version is Hex
#6633CC. A complementary color is
#AFC033. The grayscale version is
#747474. A 20% lighter version of the original color is
#8372FF, and Hex
#1D0C99 is the 20% darker color. If the color is saturated by 10%, you get
#4C3AD5. If the color is desaturated by 10%, the color
#5444C3 is obtained.