The hex color #e3def2 is a light color. The web-safe version is Hex
#CCCCFF. A complementary color is
#1C210D. The grayscale version is
#E6E6E6. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B0ABBF is the 20% darker color. If the color is saturated by 10%, you get
#E3DDF3. If the color is desaturated by 10%, the color
#E3DFF1 is obtained.