The hex color #a3e7c3 is a light color. The web-safe version is Hex
#99FFCC. A complementary color is
#5C183C. The grayscale version is
#C4C4C4. A 20% lighter version of the original color is
#D6FFF6, and Hex
#70B490 is the 20% darker color. If the color is saturated by 10%, you get
#A0EAC3. If the color is desaturated by 10%, the color
#A6E4C3 is obtained.