The hex color #81cecc is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#7E3133. The grayscale version is
#B4B4B4. A 20% lighter version of the original color is
#B4FFFF, and Hex
#4E9B99 is the 20% darker color. If the color is saturated by 10%, you get
#7CD1CE. If the color is desaturated by 10%, the color
#86CBCA is obtained.