The hex color #3d6ff3 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#C2900C. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#70A2FF, and Hex
#0A3CC0 is the 20% darker color. If the color is saturated by 10%, you get
#356CFD. If the color is desaturated by 10%, the color
#4572E9 is obtained.