The hex color #2d3cc0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#D2C33F. The grayscale version is
#636363. A 20% lighter version of the original color is
#606FF3, and Hex
#00098D is the 20% darker color. If the color is saturated by 10%, you get
#2838C9. If the color is desaturated by 10%, the color
#3240B7 is obtained.