The hex color #83c9c7 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#7C3638. The grayscale version is
#B1B1B1. A 20% lighter version of the original color is
#B6FCFA, and Hex
#509694 is the 20% darker color. If the color is saturated by 10%, you get
#7ECBC9. If the color is desaturated by 10%, the color
#88C7C5 is obtained.