The hex color #30b39d is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#CF4C62. The grayscale version is
#808080. A 20% lighter version of the original color is
#63E6D0, and Hex
#00806A is the 20% darker color. If the color is saturated by 10%, you get
#28B8A0. If the color is desaturated by 10%, the color
#38AE9A is obtained.