The hex color #dde66d is a light color. The web-safe version is Hex
#CCFF66. A complementary color is
#221992. The grayscale version is
#BBBBBB. A 20% lighter version of the original color is
#FFFFA0, and Hex
#AAB33A is the 20% darker color. If the color is saturated by 10%, you get
#E0EA65. If the color is desaturated by 10%, the color
#DAE275 is obtained.