The hex color #effcd0 is a light color. The web-safe version is Hex
#FFFFCC. A complementary color is
#10032F. The grayscale version is
#E9E9E9. A 20% lighter version of the original color is
#FFFFFF, and Hex
#BCC99D is the 20% darker color. If the color is saturated by 10%, you get
#F0FECE. If the color is desaturated by 10%, the color
#EEFAD3 is obtained.