The hex color #3dbca5 is a light color. The web-safe version is Hex
#33CC99. A complementary color is
#C2435A. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#70EFD8, and Hex
#0A8972 is the 20% darker color. If the color is saturated by 10%, you get
#35C1A8. If the color is desaturated by 10%, the color
#45B7A2 is obtained.