The hex color #3c635c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#C39CA3. The grayscale version is
#545454. A 20% lighter version of the original color is
#6F968F, and Hex
#093029 is the 20% darker color. If the color is saturated by 10%, you get
#3A655D. If the color is desaturated by 10%, the color
#3E615B is obtained.