The hex color #181818 is a dark color. The web-safe version is Hex
#000000. A complementary color is
#E7E7E7. The grayscale version is
#181818. A 20% lighter version of the original color is
#4B4B4B, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#181818. If the color is desaturated by 10%, the color
#181818 is obtained.