The hex color #4f84d0 is a dark color. The web-safe version is Hex
#6699CC. A complementary color is
#B07B2F. The grayscale version is
#8C8C8C. A 20% lighter version of the original color is
#82B7FF, and Hex
#1C519D is the 20% darker color. If the color is saturated by 10%, you get
#4983D7. If the color is desaturated by 10%, the color
#5585C9 is obtained.