The hex color #99bcc9 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#664336. The grayscale version is
#B5B5B5. A 20% lighter version of the original color is
#CCEFFC, and Hex
#668996 is the 20% darker color. If the color is saturated by 10%, you get
#96BDCB. If the color is desaturated by 10%, the color
#9CBBC7 is obtained.