The hex color #3feffc is a light color. The web-safe version is Hex
#33FFFF. A complementary color is
#C01003. The grayscale version is
#B9B9B9. A 20% lighter version of the original color is
#72FFFF, and Hex
#0CBCC9 is the 20% darker color. If the color is saturated by 10%, you get
#33F4FF. If the color is desaturated by 10%, the color
#4BEAF5 is obtained.