The hex color #e3fd1f is a light color. The web-safe version is Hex
#CCFF33. A complementary color is
#1C02E0. The grayscale version is
#AAAAAA. A 20% lighter version of the original color is
#FFFF52, and Hex
#B0CA00 is the 20% darker color. If the color is saturated by 10%, you get
#E9FF11. If the color is desaturated by 10%, the color
#DDF52D is obtained.