The hex color #064d3d is a dark color. The web-safe version is Hex
#006633. A complementary color is
#F9B2C2. The grayscale version is
#303030. A 20% lighter version of the original color is
#398070, and Hex
#001A0A is the 20% darker color. If the color is saturated by 10%, you get
#02503E. If the color is desaturated by 10%, the color
#0A4A3C is obtained.