The hex color #99a9b4 is a light color. The web-safe version is Hex
#9999CC. A complementary color is
#66564B. The grayscale version is
#A7A7A7. A 20% lighter version of the original color is
#CCDCE7, and Hex
#667681 is the 20% darker color. If the color is saturated by 10%, you get
#98A9B5. If the color is desaturated by 10%, the color
#9AA9B3 is obtained.