The hex color #587b64 is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A7849B. The grayscale version is
#686868. A 20% lighter version of the original color is
#8BAE97, and Hex
#254831 is the 20% darker color. If the color is saturated by 10%, you get
#567D64. If the color is desaturated by 10%, the color
#5A7964 is obtained.