The hex color #5f9de1 is a light color. The web-safe version is Hex
#6699CC. A complementary color is
#A0621E. The grayscale version is
#9F9F9F. A 20% lighter version of the original color is
#92D0FF, and Hex
#2C6AAE is the 20% darker color. If the color is saturated by 10%, you get
#599DE8. If the color is desaturated by 10%, the color
#659DDA is obtained.