The hex color #279A8F is a dark color. The web-safe version is Hex
#339999. A complementary color is
#D86570. The grayscale version is
#707070. A 20% lighter version of the original color is
#5ACDC2, and Hex
#00675C is the 20% darker color. If the color is saturated by 10%, you get
#209E92. If the color is desaturated by 10%, the color
#2E968C is obtained.