The hex color #F3F366 is a light color. The web-safe version is Hex
#FFFF66. A complementary color is
#0C0C99. The grayscale version is
#C4C4C4. A 20% lighter version of the original color is
#FFFF99, and Hex
#C0C033 is the 20% darker color. If the color is saturated by 10%, you get
#F8F85D. If the color is desaturated by 10%, the color
#EEEE6F is obtained.