The hex color #337CE2 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#CC831D. The grayscale version is
#868686. A 20% lighter version of the original color is
#66AFFF, and Hex
#0049AF is the 20% darker color. If the color is saturated by 10%, you get
#2B7BEB. If the color is desaturated by 10%, the color
#3B7DD9 is obtained.