The hex color #201b64 is a dark color. The web-safe version is Hex
#333366. A complementary color is
#DFE49B. The grayscale version is
#353535. A 20% lighter version of the original color is
#534E97, and Hex
#000031 is the 20% darker color. If the color is saturated by 10%, you get
#1E1869. If the color is desaturated by 10%, the color
#221E5F is obtained.