The hex color #6ee4ef is a light color. The web-safe version is Hex
#66CCFF. A complementary color is
#911B10. The grayscale version is
#C0C0C0. A 20% lighter version of the original color is
#A1FFFF, and Hex
#3BB1BC is the 20% darker color. If the color is saturated by 10%, you get
#66E8F4. If the color is desaturated by 10%, the color
#76E0EA is obtained.