The hex color #C9F5E4 is a light color. The web-safe version is Hex
#CCFFCC. A complementary color is
#360A1B. The grayscale version is
#E1E1E1. A 20% lighter version of the original color is
#FCFFFF, and Hex
#96C2B1 is the 20% darker color. If the color is saturated by 10%, you get
#C7F7E4. If the color is desaturated by 10%, the color
#CBF3E4 is obtained.