The hex color #e3f815 is a light color. The web-safe version is Hex
#CCFF00. A complementary color is
#1C07EA. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#FFFF48, and Hex
#B0C500 is the 20% darker color. If the color is saturated by 10%, you get
#E9FF07. If the color is desaturated by 10%, the color
#DDF023 is obtained.