The hex color #3a38a4 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C5C75B. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#6D6BD7, and Hex
#070571 is the 20% darker color. If the color is saturated by 10%, you get
#3734AB. If the color is desaturated by 10%, the color
#3D3C9D is obtained.