The hex color #7ddec2 is a light color. The web-safe version is Hex
#66CCCC. A complementary color is
#82213D. The grayscale version is
#B4B4B4. A 20% lighter version of the original color is
#B0FFF5, and Hex
#4AAB8F is the 20% darker color. If the color is saturated by 10%, you get
#77E2C3. If the color is desaturated by 10%, the color
#83DAC1 is obtained.