The hex color #e0f3e1 is a light color. The web-safe version is Hex
#CCFFCC. A complementary color is
#1F0C1E. The grayscale version is
#E7E7E7. A 20% lighter version of the original color is
#FFFFFF, and Hex
#ADC0AE is the 20% darker color. If the color is saturated by 10%, you get
#DFF4E0. If the color is desaturated by 10%, the color
#E1F2E2 is obtained.