The hex color #3d79f0 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#C2860F. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#70ACFF, and Hex
#0A46BD is the 20% darker color. If the color is saturated by 10%, you get
#3577FA. If the color is desaturated by 10%, the color
#457BE6 is obtained.