The hex color #18234c is a dark color. The web-safe version is Hex
#003333. A complementary color is
#E7DCB3. The grayscale version is
#2D2D2D. A 20% lighter version of the original color is
#4B567F, and Hex
#000019 is the 20% darker color. If the color is saturated by 10%, you get
#16224F. If the color is desaturated by 10%, the color
#1A2449 is obtained.