The hex color #3e3d4c is a dark color. The web-safe version is Hex
#333333. A complementary color is
#C1C2B3. The grayscale version is
#424242. A 20% lighter version of the original color is
#71707F, and Hex
#0B0A19 is the 20% darker color. If the color is saturated by 10%, you get
#3E3C4D. If the color is desaturated by 10%, the color
#3E3E4B is obtained.