The hex color #ddee09 is a light color. The web-safe version is Hex
#CCFF00. A complementary color is
#2211F6. The grayscale version is
#9C9C9C. A 20% lighter version of the original color is
#FFFF3C, and Hex
#AABB00 is the 20% darker color. If the color is saturated by 10%, you get
#E4F600. If the color is desaturated by 10%, the color
#D7E618 is obtained.