The hex color #3b39c9 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C4C636. The grayscale version is
#6A6A6A. A 20% lighter version of the original color is
#6E6CFC, and Hex
#080696 is the 20% darker color. If the color is saturated by 10%, you get
#3634D3. If the color is desaturated by 10%, the color
#403EBF is obtained.