The hex color #5a7a6c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A58593. The grayscale version is
#6B6B6B. A 20% lighter version of the original color is
#8DAD9F, and Hex
#274739 is the 20% darker color. If the color is saturated by 10%, you get
#587C6C. If the color is desaturated by 10%, the color
#5C786C is obtained.