The hex color #1b23db is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E4DC24. The grayscale version is
#5E5E5E. A 20% lighter version of the original color is
#4E56FF, and Hex
#0000A8 is the 20% darker color. If the color is saturated by 10%, you get
#141DE8. If the color is desaturated by 10%, the color
#2229CE is obtained.