The hex color #f3e11b is a light color. The web-safe version is Hex
#FFCC33. A complementary color is
#0C1EE4. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#FFFF4E, and Hex
#C0AE00 is the 20% darker color. If the color is saturated by 10%, you get
#FBE70D. If the color is desaturated by 10%, the color
#EBDB29 is obtained.