The hex color #000138 is a dark color. The web-safe version is Hex
#000033. A complementary color is
#FFFEC7. The grayscale version is
#131313. A 20% lighter version of the original color is
#33346B, and Hex
#000005 is the 20% darker color. If the color is saturated by 10%, you get
#00003C. If the color is desaturated by 10%, the color
#020334 is obtained.