The hex color #2dd9cd is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#D22632. The grayscale version is
#9C9C9C. A 20% lighter version of the original color is
#60FFFF, and Hex
#00A69A is the 20% darker color. If the color is saturated by 10%, you get
#22DFD2. If the color is desaturated by 10%, the color
#38D3C8 is obtained.