The hex color #c4cccc is a light color. The web-safe version is Hex
#CCCCCC. A complementary color is
#3B3333. The grayscale version is
#C9C9C9. A 20% lighter version of the original color is
#F7FFFF, and Hex
#919999 is the 20% darker color. If the color is saturated by 10%, you get
#C3CCCC. If the color is desaturated by 10%, the color
#C5CCCC is obtained.