The hex color #a4b8c0 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#5B473F. The grayscale version is
#B4B4B4. A 20% lighter version of the original color is
#D7EBF3, and Hex
#71858D is the 20% darker color. If the color is saturated by 10%, you get
#A2B8C1. If the color is desaturated by 10%, the color
#A6B8BF is obtained.