The hex color #30f9c6 is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#CF0639. The grayscale version is
#A5A5A5. A 20% lighter version of the original color is
#63FFF9, and Hex
#00C693 is the 20% darker color. If the color is saturated by 10%, you get
#24FFC9. If the color is desaturated by 10%, the color
#3CF1C3 is obtained.