The hex color #213C92 is a dark color. The web-safe version is Hex
#333399. A complementary color is
#DEC36D. The grayscale version is
#505050. A 20% lighter version of the original color is
#546FC5, and Hex
#00095F is the 20% darker color. If the color is saturated by 10%, you get
#1C3A99. If the color is desaturated by 10%, the color
#263E8B is obtained.