The hex color #40e4cd is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#BF1B32. The grayscale version is
#A6A6A6. A 20% lighter version of the original color is
#73FFFF, and Hex
#0DB19A is the 20% darker color. If the color is saturated by 10%, you get
#36EAD1. If the color is desaturated by 10%, the color
#4ADEC9 is obtained.