The hex color #306fcc is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#CF9033. The grayscale version is
#797979. A 20% lighter version of the original color is
#63A2FF, and Hex
#003C99 is the 20% darker color. If the color is saturated by 10%, you get
#296ED4. If the color is desaturated by 10%, the color
#3770C4 is obtained.