The hex color #3ed1ef is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#C12E10. The grayscale version is
#AAAAAA. A 20% lighter version of the original color is
#71FFFF, and Hex
#0B9EBC is the 20% darker color. If the color is saturated by 10%, you get
#33D5F6. If the color is desaturated by 10%, the color
#49CDE8 is obtained.