The hex color #dde52f is a light color. The web-safe version is Hex
#CCCC33. A complementary color is
#221AD0. The grayscale version is
#A6A6A6. A 20% lighter version of the original color is
#FFFF62, and Hex
#AAB200 is the 20% darker color. If the color is saturated by 10%, you get
#E3EB23. If the color is desaturated by 10%, the color
#D7DF3B is obtained.