The hex color #c4d8ed is a light color. The web-safe version is Hex
#CCCCFF. A complementary color is
#3B2712. The grayscale version is
#D8D8D8. A 20% lighter version of the original color is
#F7FFFF, and Hex
#91A5BA is the 20% darker color. If the color is saturated by 10%, you get
#C2D8EF. If the color is desaturated by 10%, the color
#C6D8EB is obtained.