The hex color #E9F3E2 is a light color. The web-safe version is Hex
#FFFFCC. A complementary color is
#160C1D. The grayscale version is
#EAEAEA. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B6C0AF is the 20% darker color. If the color is saturated by 10%, you get
#E9F4E1. If the color is desaturated by 10%, the color
#E9F2E3 is obtained.