The hex color #1f77d9 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#E08826. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#52AAFF, and Hex
#0044A6 is the 20% darker color. If the color is saturated by 10%, you get
#1677E2. If the color is desaturated by 10%, the color
#2877D0 is obtained.