The hex color #40578c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#BFA873. The grayscale version is
#616161. A 20% lighter version of the original color is
#738ABF, and Hex
#0D2459 is the 20% darker color. If the color is saturated by 10%, you get
#3D5690. If the color is desaturated by 10%, the color
#435888 is obtained.