The hex color #18f9da is a light color. The web-safe version is Hex
#00FFCC. A complementary color is
#E70625. The grayscale version is
#A4A4A4. A 20% lighter version of the original color is
#4BFFFF, and Hex
#00C6A7 is the 20% darker color. If the color is saturated by 10%, you get
#0AFFDF. If the color is desaturated by 10%, the color
#26F0D5 is obtained.