The hex color #438e7c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#BC7183. The grayscale version is
#6F6F6F. A 20% lighter version of the original color is
#76C1AF, and Hex
#105B49 is the 20% darker color. If the color is saturated by 10%, you get
#3F917D. If the color is desaturated by 10%, the color
#478B7B is obtained.