The hex color #2F4351 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D0BCAE. The grayscale version is
#414141. A 20% lighter version of the original color is
#627684, and Hex
#00101E is the 20% darker color. If the color is saturated by 10%, you get
#2D4353. If the color is desaturated by 10%, the color
#31434F is obtained.