The hex color #3d765c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C289A3. The grayscale version is
#5A5A5A. A 20% lighter version of the original color is
#70A98F, and Hex
#0A4329 is the 20% darker color. If the color is saturated by 10%, you get
#3A795C. If the color is desaturated by 10%, the color
#40735C is obtained.