The hex color #e6f3e4 is a light color. The web-safe version is Hex
#FFFFCC. A complementary color is
#190C1B. The grayscale version is
#EAEAEA. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B3C0B1 is the 20% darker color. If the color is saturated by 10%, you get
#E6F4E3. If the color is desaturated by 10%, the color
#E6F2E5 is obtained.