The hex color #2F366D is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D0C992. The grayscale version is
#464646. A 20% lighter version of the original color is
#6269A0, and Hex
#00033A is the 20% darker color. If the color is saturated by 10%, you get
#2D3471. If the color is desaturated by 10%, the color
#313869 is obtained.