The hex color #3dffdd is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#C20022. The grayscale version is
#B3B3B3. A 20% lighter version of the original color is
#70FFFF, and Hex
#0ACCAA is the 20% darker color. If the color is saturated by 10%, you get
#31FFE1. If the color is desaturated by 10%, the color
#49F7D9 is obtained.