The hex color #3d6df5 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#C2920A. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#70A0FF, and Hex
#0A3AC2 is the 20% darker color. If the color is saturated by 10%, you get
#356AFF. If the color is desaturated by 10%, the color
#4570EA is obtained.