The hex color #3a72db is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C58D24. The grayscale version is
#828282. A 20% lighter version of the original color is
#6DA5FF, and Hex
#073FA8 is the 20% darker color. If the color is saturated by 10%, you get
#3370E4. If the color is desaturated by 10%, the color
#4174D2 is obtained.