The hex color #81bcec is a light color. The web-safe version is Hex
#99CCFF. A complementary color is
#7E4313. The grayscale version is
#B8B8B8. A 20% lighter version of the original color is
#B4EFFF, and Hex
#4E89B9 is the 20% darker color. If the color is saturated by 10%, you get
#7BBCF1. If the color is desaturated by 10%, the color
#87BCE7 is obtained.