The hex color #e4f5f3 is a light color. The web-safe version is Hex
#CCFFFF. A complementary color is
#1B0A0C. The grayscale version is
#EFEFEF. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B1C2C0 is the 20% darker color. If the color is saturated by 10%, you get
#E3F6F3. If the color is desaturated by 10%, the color
#E5F4F3 is obtained.