The hex color #2c555c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D3AAA3. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#5F888F, and Hex
#002229 is the 20% darker color. If the color is saturated by 10%, you get
#29565E. If the color is desaturated by 10%, the color
#2F545A is obtained.