The hex color #576adc is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#A89523. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#8A9DFF, and Hex
#2437A9 is the 20% darker color. If the color is saturated by 10%, you get
#5267E4. If the color is desaturated by 10%, the color
#5C6DD4 is obtained.