The hex color #1dfdf9 is a light color. The web-safe version is Hex
#33FFFF. A complementary color is
#E20206. The grayscale version is
#B1B1B1. A 20% lighter version of the original color is
#50FFFF, and Hex
#00CAC6 is the 20% darker color. If the color is saturated by 10%, you get
#0EFFFF. If the color is desaturated by 10%, the color
#2CF5F2 is obtained.