The hex color #2d278e is a dark color. The web-safe version is Hex
#333399. A complementary color is
#D2D871. The grayscale version is
#4B4B4B. A 20% lighter version of the original color is
#605AC1, and Hex
#00005B is the 20% darker color. If the color is saturated by 10%, you get
#2A2395. If the color is desaturated by 10%, the color
#302B87 is obtained.