The hex color #000290 is a dark color. The web-safe version is Hex
#000099. A complementary color is
#FFFD6F. The grayscale version is
#313131. A 20% lighter version of the original color is
#3335C3, and Hex
#00005D is the 20% darker color. If the color is saturated by 10%, you get
#00009A. If the color is desaturated by 10%, the color
#050786 is obtained.