The hex color #3b3e9d is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C4C162. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#6E71D0, and Hex
#080B6A is the 20% darker color. If the color is saturated by 10%, you get
#383BA3. If the color is desaturated by 10%, the color
#3E4197 is obtained.