The hex color #334ecc is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#CCB133. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#6681FF, and Hex
#001B99 is the 20% darker color. If the color is saturated by 10%, you get
#2D4BD5. If the color is desaturated by 10%, the color
#3951C3 is obtained.