The hex color #a9e3d4 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#561C2B. The grayscale version is
#CBCBCB. A 20% lighter version of the original color is
#DCFFFF, and Hex
#76B0A1 is the 20% darker color. If the color is saturated by 10%, you get
#A6E5D5. If the color is desaturated by 10%, the color
#ACE1D3 is obtained.