The hex color #1f81b7 is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#E07E48. The grayscale version is
#727272. A 20% lighter version of the original color is
#52B4EA, and Hex
#004E84 is the 20% darker color. If the color is saturated by 10%, you get
#1782BE. If the color is desaturated by 10%, the color
#2780B0 is obtained.