The hex color #247a6c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#DB8593. The grayscale version is
#595959. A 20% lighter version of the original color is
#57AD9F, and Hex
#004739 is the 20% darker color. If the color is saturated by 10%, you get
#1F7D6E. If the color is desaturated by 10%, the color
#29776A is obtained.