The hex color #40584c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#BFA7B3. The grayscale version is
#4C4C4C. A 20% lighter version of the original color is
#738B7F, and Hex
#0D2519 is the 20% darker color. If the color is saturated by 10%, you get
#3F594C. If the color is desaturated by 10%, the color
#41574C is obtained.