The hex color #3d13f0 is a dark color. The web-safe version is Hex
#3300FF. A complementary color is
#C2EC0F. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#7046FF, and Hex
#0A00BD is the 20% darker color. If the color is saturated by 10%, you get
#380AFD. If the color is desaturated by 10%, the color
#421CE3 is obtained.