The hex color #3a3b64 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#C5C49B. The grayscale version is
#484848. A 20% lighter version of the original color is
#6D6E97, and Hex
#070831 is the 20% darker color. If the color is saturated by 10%, you get
#393A67. If the color is desaturated by 10%, the color
#3B3C61 is obtained.