The hex color #3A04C0 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C5FB3F. The grayscale version is
#555555. A 20% lighter version of the original color is
#6D37F3, and Hex
#07008D is the 20% darker color. If the color is saturated by 10%, you get
#3700CB. If the color is desaturated by 10%, the color
#3D0CB5 is obtained.