The hex color #687c44 is a dark color. The web-safe version is Hex
#666633. A complementary color is
#9783BB. The grayscale version is
#636363. A 20% lighter version of the original color is
#9BAF77, and Hex
#354911 is the 20% darker color. If the color is saturated by 10%, you get
#697F41. If the color is desaturated by 10%, the color
#677947 is obtained.