The hex color #3e5fd2 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C1A02D. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#7192FF, and Hex
#0B2C9F is the 20% darker color. If the color is saturated by 10%, you get
#385CDB. If the color is desaturated by 10%, the color
#4462C9 is obtained.