The hex color #77757c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#888A83. The grayscale version is
#787878. A 20% lighter version of the original color is
#AAA8AF, and Hex
#444249 is the 20% darker color. If the color is saturated by 10%, you get
#77757C. If the color is desaturated by 10%, the color
#77757C is obtained.