The hex color #2c283e is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D3D7C1. The grayscale version is
#313131. A 20% lighter version of the original color is
#5F5B71, and Hex
#00000B is the 20% darker color. If the color is saturated by 10%, you get
#2C273F. If the color is desaturated by 10%, the color
#2C293D is obtained.