The hex color #3a28d0 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C5D72F. The grayscale version is
#666666. A 20% lighter version of the original color is
#6D5BFF, and Hex
#07009D is the 20% darker color. If the color is saturated by 10%, you get
#3622DB. If the color is desaturated by 10%, the color
#3E2EC5 is obtained.