The hex color #ddfb1d is a light color. The web-safe version is Hex
#CCFF33. A complementary color is
#2204E2. The grayscale version is
#A7A7A7. A 20% lighter version of the original color is
#FFFF50, and Hex
#AAC800 is the 20% darker color. If the color is saturated by 10%, you get
#E2FF0F. If the color is desaturated by 10%, the color
#D8F32B is obtained.