The hex color #2d3e5c is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D2C1A3. The grayscale version is
#424242. A 20% lighter version of the original color is
#60718F, and Hex
#000B29 is the 20% darker color. If the color is saturated by 10%, you get
#2B3E5F. If the color is desaturated by 10%, the color
#2F3E59 is obtained.