The hex color #3cc4d7 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C33B28. The grayscale version is
#9D9D9D. A 20% lighter version of the original color is
#6FF7FF, and Hex
#0991A4 is the 20% darker color. If the color is saturated by 10%, you get
#32C8DD. If the color is desaturated by 10%, the color
#46C0D1 is obtained.