The hex color #2f3e7f is a dark color. The web-safe version is Hex
#333366. A complementary color is
#D0C180. The grayscale version is
#4F4F4F. A 20% lighter version of the original color is
#6271B2, and Hex
#000B4C is the 20% darker color. If the color is saturated by 10%, you get
#2C3C84. If the color is desaturated by 10%, the color
#32407A is obtained.