The hex color #3e41db is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#C1BE24. The grayscale version is
#737373. A 20% lighter version of the original color is
#7174FF, and Hex
#0B0EA8 is the 20% darker color. If the color is saturated by 10%, you get
#393CE5. If the color is desaturated by 10%, the color
#4346D1 is obtained.