The hex color #77cccc is a light color. The web-safe version is Hex
#66CCCC. A complementary color is
#883333. The grayscale version is
#B0B0B0. A 20% lighter version of the original color is
#AAFFFF, and Hex
#449999 is the 20% darker color. If the color is saturated by 10%, you get
#71CFCF. If the color is desaturated by 10%, the color
#7DC9C9 is obtained.