The hex color #1a1b2d is a dark color. The web-safe version is Hex
#333333. A complementary color is
#E5E4D2. The grayscale version is
#212121. A 20% lighter version of the original color is
#4D4E60, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#191A2E. If the color is desaturated by 10%, the color
#1B1C2C is obtained.