The hex color #f9e43e is a light color. The web-safe version is Hex
#FFCC33. A complementary color is
#061BC1. The grayscale version is
#B4B4B4. A 20% lighter version of the original color is
#FFFF71, and Hex
#C6B10B is the 20% darker color. If the color is saturated by 10%, you get
#FFE932. If the color is desaturated by 10%, the color
#F2DF4A is obtained.