The hex color #2d666c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#D29993. The grayscale version is
#555555. A 20% lighter version of the original color is
#60999F, and Hex
#003339 is the 20% darker color. If the color is saturated by 10%, you get
#29686E. If the color is desaturated by 10%, the color
#31646A is obtained.