The hex color #5d736c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#A28C93. The grayscale version is
#696969. A 20% lighter version of the original color is
#90A69F, and Hex
#2A4039 is the 20% darker color. If the color is saturated by 10%, you get
#5C746C. If the color is desaturated by 10%, the color
#5E726C is obtained.