The hex color #2d187c is a dark color. The web-safe version is Hex
#330066. A complementary color is
#D2E783. The grayscale version is
#404040. A 20% lighter version of the original color is
#604BAF, and Hex
#000049 is the 20% darker color. If the color is saturated by 10%, you get
#2B1482. If the color is desaturated by 10%, the color
#2F1C76 is obtained.