The hex color #3b7b64 is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C4849B. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#6EAE97, and Hex
#084831 is the 20% darker color. If the color is saturated by 10%, you get
#387E65. If the color is desaturated by 10%, the color
#3F7863 is obtained.