The hex color #687d1a is a dark color. The web-safe version is Hex
#666633. A complementary color is
#9782E5. The grayscale version is
#555555. A 20% lighter version of the original color is
#9BB04D, and Hex
#354A00 is the 20% darker color. If the color is saturated by 10%, you get
#6A8114. If the color is desaturated by 10%, the color
#667920 is obtained.