The hex color #c4e7ff is a light color. The web-safe version is Hex
#CCFFFF. A complementary color is
#3B1800. The grayscale version is
#E3E3E3. A 20% lighter version of the original color is
#F7FFFF, and Hex
#91B4CC is the 20% darker color. If the color is saturated by 10%, you get
#C1E7FF. If the color is desaturated by 10%, the color
#C7E7FC is obtained.