How do you color ponytail extension human hair that is too light?

To color ponytail extension made of human hair that is too light, follow these steps:

Choose the suitable dye: Opt for a 10-volume developer or a demi-permanent color, as they are typically recommended for hair extensions. Avoid using 30- and 40-volume developers, as they can damage the extensions.
Test a small section: Before applying the dye to the entire extension, test a small section to ensure the desired color is achieved. This will also help you determine the appropriate processing time.
Prepare the hair extensions: Brush the extensions thoroughly to remove any tangles and knots. You may also lightly dampen the hair to make it easier to work.
Mix the dye: Follow the manufacturer's instructions to mix the dye and developer in the correct proportions. Ensure you have enough dye to cover the full extension.
Apply the dye: Using a color brush, apply the dye to the hair extensions section by section, avoiding the attachment area. Make sure the hair is completely saturated with the dye, using your fingers to rub the color into the hair gently.
Process the dye: Allow the dye to process according to the manufacturer's instructions, which typically range from 20 to 35 minutes. Remember that lighter shades may take less time, while darker ones require more time.
Rinse and condition: Once the processing time is complete, rinse the dye using cool water, directing the water flow from the top of the extensions towards the ends. Gently work the excess dye out with your fingers. After rinsing, apply a conditioner specifically designed for color-treated hair and let it sit for a few minutes before rinsing again.
Dry and style: Gently squeeze and pat the hair extensions dry with a towel, avoiding rubbing the wet hair. Allow the extensions to air dry, or use a low heat setting on a hairdryer. Once dry, style the extensions as desired.
Remember, if you're uncomfortable with dyeing the extensions yourself or the process seems overwhelming, it's best to consult a professional hair colorist for assistance.