The hex color #74efdd is a light color. The web-safe version is Hex
#66FFCC. A complementary color is
#8B1022. The grayscale version is
#C0C0C0. A 20% lighter version of the original color is
#A7FFFF, and Hex
#41BCAA is the 20% darker color. If the color is saturated by 10%, you get
#6CF4E0. If the color is desaturated by 10%, the color
#7CEADA is obtained.