The hex color #3ecec5 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C1313A. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#71FFF8, and Hex
#0B9B92 is the 20% darker color. If the color is saturated by 10%, you get
#35D3C9. If the color is desaturated by 10%, the color
#47C9C1 is obtained.