The hex color #84f3d4 is a light color. The web-safe version is Hex
#99FFCC. A complementary color is
#7B0C2B. The grayscale version is
#C4C4C4. A 20% lighter version of the original color is
#B7FFFF, and Hex
#51C0A1 is the 20% darker color. If the color is saturated by 10%, you get
#7EF8D6. If the color is desaturated by 10%, the color
#8AEED2 is obtained.