The hex color #3ffdcc is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#C00233. The grayscale version is
#ADADAD. A 20% lighter version of the original color is
#72FFFF, and Hex
#0CCA99 is the 20% darker color. If the color is saturated by 10%, you get
#34FFCF. If the color is desaturated by 10%, the color
#4AF5C9 is obtained.