The hex color #3e726b is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C18D94. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#71A59E, and Hex
#0B3F38 is the 20% darker color. If the color is saturated by 10%, you get
#3B746C. If the color is desaturated by 10%, the color
#41706A is obtained.