The hex color #240B5E is a dark color. The web-safe version is Hex
#330066. A complementary color is
#DBF4A1. The grayscale version is
#2F2F2F. A 20% lighter version of the original color is
#573E91, and Hex
#00002B is the 20% darker color. If the color is saturated by 10%, you get
#230763. If the color is desaturated by 10%, the color
#250F59 is obtained.