The hex color #a9eee4 is a light color. The web-safe version is Hex
#99FFCC. A complementary color is
#56111B. The grayscale version is
#D4D4D4. A 20% lighter version of the original color is
#DCFFFF, and Hex
#76BBB1 is the 20% darker color. If the color is saturated by 10%, you get
#A5F1E6. If the color is desaturated by 10%, the color
#ADEBE2 is obtained.