The hex color #b9dddd is a light color. The web-safe version is Hex
#CCCCCC. A complementary color is
#462222. The grayscale version is
#D1D1D1. A 20% lighter version of the original color is
#ECFFFF, and Hex
#86AAAA is the 20% darker color. If the color is saturated by 10%, you get
#B7DEDE. If the color is desaturated by 10%, the color
#BBDCDC is obtained.