The hex color #a9c9d5 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#56362A. The grayscale version is
#C2C2C2. A 20% lighter version of the original color is
#DCFCFF, and Hex
#7696A2 is the 20% darker color. If the color is saturated by 10%, you get
#A6CAD7. If the color is desaturated by 10%, the color
#ACC8D3 is obtained.