The hex color #519bcd is a light color. The web-safe version is Hex
#6699CC. A complementary color is
#AE6432. The grayscale version is
#939393. A 20% lighter version of the original color is
#84CEFF, and Hex
#1E689A is the 20% darker color. If the color is saturated by 10%, you get
#4A9CD3. If the color is desaturated by 10%, the color
#589AC7 is obtained.