The hex color #000379 is a dark color. The web-safe version is Hex
#000066. A complementary color is
#FFFC86. The grayscale version is
#292929. A 20% lighter version of the original color is
#3336AC, and Hex
#000046 is the 20% darker color. If the color is saturated by 10%, you get
#000081. If the color is desaturated by 10%, the color
#040771 is obtained.