The hex color #1ef4dd is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#E10B22. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#51FFFF, and Hex
#00C1AA is the 20% darker color. If the color is saturated by 10%, you get
#11FCE3. If the color is desaturated by 10%, the color
#2CECD7 is obtained.