The hex color #e9de1e is a light color. The web-safe version is Hex
#FFCC33. A complementary color is
#1621E1. The grayscale version is
#A2A2A2. A 20% lighter version of the original color is
#FFFF51, and Hex
#B6AB00 is the 20% darker color. If the color is saturated by 10%, you get
#F0E411. If the color is desaturated by 10%, the color
#E2D82B is obtained.