The hex color #81c7ea is a light color. The web-safe version is Hex
#99CCFF. A complementary color is
#7E3815. The grayscale version is
#BBBBBB. A 20% lighter version of the original color is
#B4FAFF, and Hex
#4E94B7 is the 20% darker color. If the color is saturated by 10%, you get
#7BC8EF. If the color is desaturated by 10%, the color
#87C6E5 is obtained.