The hex color #3dbda8 is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#C24257. The grayscale version is
#8B8B8B. A 20% lighter version of the original color is
#70F0DB, and Hex
#0A8A75 is the 20% darker color. If the color is saturated by 10%, you get
#35C2AB. If the color is desaturated by 10%, the color
#45B8A5 is obtained.