The hex color #eff49f is a light color. The web-safe version is Hex
#FFFF99. A complementary color is
#100B60. The grayscale version is
#D6D6D6. A 20% lighter version of the original color is
#FFFFD2, and Hex
#BCC16C is the 20% darker color. If the color is saturated by 10%, you get
#F2F79A. If the color is desaturated by 10%, the color
#EDF1A5 is obtained.