The hex color #1a1b28 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5E4D7. The grayscale version is
#1F1F1F. A 20% lighter version of the original color is
#4D4E5B, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#1A1B29. If the color is desaturated by 10%, the color
#1B1B27 is obtained.