The hex color #e3f90a is a light color. The web-safe version is Hex
#CCFF00. A complementary color is
#1C06F5. The grayscale version is
#A2A2A2. A 20% lighter version of the original color is
#FFFF3D, and Hex
#B0C600 is the 20% darker color. If the color is saturated by 10%, you get
#EAFF00. If the color is desaturated by 10%, the color
#DDF019 is obtained.