The hex color #3c586c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C3A793. The grayscale version is
#555555. A 20% lighter version of the original color is
#6F8B9F, and Hex
#092539 is the 20% darker color. If the color is saturated by 10%, you get
#39586E. If the color is desaturated by 10%, the color
#3F586A is obtained.