The hex color #3d68a5 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C2975A. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#709BD8, and Hex
#0A3572 is the 20% darker color. If the color is saturated by 10%, you get
#3867AB. If the color is desaturated by 10%, the color
#4269A0 is obtained.