The hex color #687e2f is a dark color. The web-safe version is Hex
#666633. A complementary color is
#9781D0. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#9BB162, and Hex
#354B00 is the 20% darker color. If the color is saturated by 10%, you get
#69812A. If the color is desaturated by 10%, the color
#677B34 is obtained.