The hex color #4389cc is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#BC7633. The grayscale version is
#888888. A 20% lighter version of the original color is
#76BCFF, and Hex
#105699 is the 20% darker color. If the color is saturated by 10%, you get
#3C89D3. If the color is desaturated by 10%, the color
#4A89C5 is obtained.