The hex color #81b7df is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#7E4820. The grayscale version is
#B2B2B2. A 20% lighter version of the original color is
#B4EAFF, and Hex
#4E84AC is the 20% darker color. If the color is saturated by 10%, you get
#7CB7E3. If the color is desaturated by 10%, the color
#86B7DB is obtained.