The hex color #3b509c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#C4AF63. The grayscale version is
#626262. A 20% lighter version of the original color is
#6E83CF, and Hex
#081D69 is the 20% darker color. If the color is saturated by 10%, you get
#374EA2. If the color is desaturated by 10%, the color
#3F5296 is obtained.