The hex color #406e54 is a dark color. The web-safe version is Hex
#336666. A complementary color is
#BF91AB. The grayscale version is
#565656. A 20% lighter version of the original color is
#73A187, and Hex
#0D3B21 is the 20% darker color. If the color is saturated by 10%, you get
#3E7054. If the color is desaturated by 10%, the color
#426C54 is obtained.