The hex color #e3f2e4 is a light color. The web-safe version is Hex
#CCFFCC. A complementary color is
#1C0D1B. The grayscale version is
#E8E8E8. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B0BFB1 is the 20% darker color. If the color is saturated by 10%, you get
#E2F3E4. If the color is desaturated by 10%, the color
#E4F1E4 is obtained.