The hex color #e3f7e1 is a light color. The web-safe version is Hex
#CCFFCC. A complementary color is
#1C081E. The grayscale version is
#E9E9E9. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B0C4AE is the 20% darker color. If the color is saturated by 10%, you get
#E2F8E0. If the color is desaturated by 10%, the color
#E4F6E2 is obtained.