The hex color #40534c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#BFACB3. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#73867F, and Hex
#0D2019 is the 20% darker color. If the color is saturated by 10%, you get
#3F544C. If the color is desaturated by 10%, the color
#41524C is obtained.