The hex color #1a40b6 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E5BF49. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#4D73E9, and Hex
#000D83 is the 20% darker color. If the color is saturated by 10%, you get
#143DBF. If the color is desaturated by 10%, the color
#2043AD is obtained.