The hex color #0f9da8 is a dark color. The web-safe version is Hex
#009999. A complementary color is
#F06257. The grayscale version is
#717171. A 20% lighter version of the original color is
#42D0DB, and Hex
#006A75 is the 20% darker color. If the color is saturated by 10%, you get
#05A1AD. If the color is desaturated by 10%, the color
#1999A3 is obtained.