The hex color #3c72cc is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C38D33. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#6FA5FF, and Hex
#093F99 is the 20% darker color. If the color is saturated by 10%, you get
#3571D4. If the color is desaturated by 10%, the color
#4373C4 is obtained.