The hex color #3e38bb is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C1C744. The grayscale version is
#666666. A 20% lighter version of the original color is
#716BEE, and Hex
#0B0588 is the 20% darker color. If the color is saturated by 10%, you get
#3A33C4. If the color is desaturated by 10%, the color
#423DB2 is obtained.