The hex color #a9f3e8 is a light color. The web-safe version is Hex
#99FFFF. A complementary color is
#560C17. The grayscale version is
#D7D7D7. A 20% lighter version of the original color is
#DCFFFF, and Hex
#76C0B5 is the 20% darker color. If the color is saturated by 10%, you get
#A4F6EA. If the color is desaturated by 10%, the color
#AEF0E6 is obtained.