The hex color #3a38d1 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C5C72E. The grayscale version is
#6C6C6C. A 20% lighter version of the original color is
#6D6BFF, and Hex
#07059E is the 20% darker color. If the color is saturated by 10%, you get
#3533DB. If the color is desaturated by 10%, the color
#3F3DC7 is obtained.