The hex color #E4F5E2 is a light color. The web-safe version is Hex
#CCFFCC. A complementary color is
#1B0A1D. The grayscale version is
#E9E9E9. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B1C2AF is the 20% darker color. If the color is saturated by 10%, you get
#E4F6E1. If the color is desaturated by 10%, the color
#E5F4E3 is obtained.