The hex color #E5E511 is a light color. The web-safe version is Hex
#CCCC00. A complementary color is
#1A1AEE. The grayscale version is
#9E9E9E. A 20% lighter version of the original color is
#FFFF44, and Hex
#B2B200 is the 20% darker color. If the color is saturated by 10%, you get
#ECEC03. If the color is desaturated by 10%, the color
#DEDE1F is obtained.