The hex color #3ef1db is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#C10E24. The grayscale version is
#AEAEAE. A 20% lighter version of the original color is
#71FFFF, and Hex
#0BBEA8 is the 20% darker color. If the color is saturated by 10%, you get
#33F8E0. If the color is desaturated by 10%, the color
#49EAD7 is obtained.