The hex color #308b7c is a dark color. The web-safe version is Hex
#339966. A complementary color is
#CF7483. The grayscale version is
#686868. A 20% lighter version of the original color is
#63BEAF, and Hex
#005849 is the 20% darker color. If the color is saturated by 10%, you get
#2A8F7E. If the color is desaturated by 10%, the color
#36877A is obtained.