The hex color #81f5ed is a light color. The web-safe version is Hex
#99FFFF. A complementary color is
#7E0A12. The grayscale version is
#CCCCCC. A 20% lighter version of the original color is
#B4FFFF, and Hex
#4EC2BA is the 20% darker color. If the color is saturated by 10%, you get
#7AF9F0. If the color is desaturated by 10%, the color
#88F1EA is obtained.