The hex color #658e7c is a dark color. The web-safe version is Hex
#669966. A complementary color is
#9A7183. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#98C1AF, and Hex
#325B49 is the 20% darker color. If the color is saturated by 10%, you get
#63907C. If the color is desaturated by 10%, the color
#678C7C is obtained.