The hex color #e4e20c is a light color. The web-safe version is Hex
#CCCC00. A complementary color is
#1B1DF3. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#FFFF3F, and Hex
#B1AF00 is the 20% darker color. If the color is saturated by 10%, you get
#EBE900. If the color is desaturated by 10%, the color
#DDDB1A is obtained.