The hex color #3de7b3 is a light color. The web-safe version is Hex
#33FFCC. A complementary color is
#C2184C. The grayscale version is
#9D9D9D. A 20% lighter version of the original color is
#70FFE6, and Hex
#0AB480 is the 20% darker color. If the color is saturated by 10%, you get
#33EEB5. If the color is desaturated by 10%, the color
#47E0B1 is obtained.