The hex color #1f84f3 is a dark color. The web-safe version is Hex
#3399FF. A complementary color is
#E07B0C. The grayscale version is
#878787. A 20% lighter version of the original color is
#52B7FF, and Hex
#0051C0 is the 20% darker color. If the color is saturated by 10%, you get
#1584FE. If the color is desaturated by 10%, the color
#2984E8 is obtained.