The hex color #e9f3f5 is a light color. The web-safe version is Hex
#FFFFFF. A complementary color is
#160C0A. The grayscale version is
#F0F0F0. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B6C0C2 is the 20% darker color. If the color is saturated by 10%, you get
#E8F3F5. If the color is desaturated by 10%, the color
#EAF3F5 is obtained.