The hex color #11D5E3 is a light color. The web-safe version is Hex
#00CCCC. A complementary color is
#EE2A1C. The grayscale version is
#989898. A 20% lighter version of the original color is
#44FFFF, and Hex
#00A2B0 is the 20% darker color. If the color is saturated by 10%, you get
#03DBEA. If the color is desaturated by 10%, the color
#1FCFDC is obtained.