The hex color #3f68c4 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C0973B. The grayscale version is
#797979. A 20% lighter version of the original color is
#729BF7, and Hex
#0C3591 is the 20% darker color. If the color is saturated by 10%, you get
#3966CC. If the color is desaturated by 10%, the color
#456ABD is obtained.