The hex color #c9cefb is a light color. The web-safe version is Hex
#CCCCFF. A complementary color is
#363104. The grayscale version is
#DBDBDB. A 20% lighter version of the original color is
#FCFFFF, and Hex
#969BC8 is the 20% darker color. If the color is saturated by 10%, you get
#C7CDFE. If the color is desaturated by 10%, the color
#CBCFF8 is obtained.