The hex color #FBFF04 is a light color. The web-safe version is Hex
#FFFF00. A complementary color is
#0400FB. The grayscale version is
#AAAAAA. A 20% lighter version of the original color is
#FFFF37, and Hex
#C8CC00 is the 20% darker color. If the color is saturated by 10%, you get
#FFFF00. If the color is desaturated by 10%, the color
#F3F715 is obtained.