The hex color #428ffd is a light color. The web-safe version is Hex
#3399FF. A complementary color is
#BD7002. The grayscale version is
#9A9A9A. A 20% lighter version of the original color is
#75C2FF, and Hex
#0F5CCA is the 20% darker color. If the color is saturated by 10%, you get
#398EFF. If the color is desaturated by 10%, the color
#4B90F3 is obtained.