The hex color #1a1828 is a dark color. The web-safe version is Hex
#330033. A complementary color is
#E5E7D7. The grayscale version is
#1E1E1E. A 20% lighter version of the original color is
#4D4B5B, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#1A1729. If the color is desaturated by 10%, the color
#1A1927 is obtained.