The hex color #3a279d is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C5D862. The grayscale version is
#555555. A 20% lighter version of the original color is
#6D5AD0, and Hex
#07006A is the 20% darker color. If the color is saturated by 10%, you get
#3722A4. If the color is desaturated by 10%, the color
#3D2C96 is obtained.