The hex color #64827c is a dark color. The web-safe version is Hex
#669966. A complementary color is
#9B7D83. The grayscale version is
#767676. A 20% lighter version of the original color is
#97B5AF, and Hex
#314F49 is the 20% darker color. If the color is saturated by 10%, you get
#62837D. If the color is desaturated by 10%, the color
#66817B is obtained.