The hex color #3CDDF7 is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#C32208. The grayscale version is
#B0B0B0. A 20% lighter version of the original color is
#6FFFFF, and Hex
#09AAC4 is the 20% darker color. If the color is saturated by 10%, you get
#30E2FE. If the color is desaturated by 10%, the color
#48D9F0 is obtained.