The hex color #f2e40a is a light color. The web-safe version is Hex
#FFCC00. A complementary color is
#0D1BF5. The grayscale version is
#A0A0A0. A 20% lighter version of the original color is
#FFFF3D, and Hex
#BFB100 is the 20% darker color. If the color is saturated by 10%, you get
#FAEB00. If the color is desaturated by 10%, the color
#EADD19 is obtained.