The hex color #f7c21c is a light color. The web-safe version is Hex
#FFCC33. A complementary color is
#083DE3. The grayscale version is
#9C9C9C. A 20% lighter version of the original color is
#FFF54F, and Hex
#C48F00 is the 20% darker color. If the color is saturated by 10%, you get
#FFC60F. If the color is desaturated by 10%, the color
#EEBE29 is obtained.