Possible Outcomes:
* Deeper, Muted Tone: This is the most likely outcome, especially if the green is a lighter or more faded shade. The purple will neutralize some of the green tones, resulting in a deeper, possibly more muddy or muted color. It might look like a dark teal or a murky blue-purple.
* Dominated by Purple: If the purple dye is very strong or dark, it could overpower the green entirely, resulting in a mostly purple color with only subtle hints of green.
* Uneven Result: If the green hair is not evenly colored or has different tones in different sections, the purple may react differently in each area. This could lead to a patchy or uneven color result.
* Brownish Color: If the green has a lot of yellow in it, the purple dye (which contains red and blue) could mix with the yellow to create brown or muddy tones.
Factors to Consider:
* Shade and Intensity: The specific shades of green and purple are crucial. A light, pastel green will react differently than a dark, forest green. Similarly, a bright, vibrant purple will behave differently than a dark, indigo purple.
* Hair Porosity: Hair porosity (how well it absorbs and retains moisture) affects how the dye is taken up. Porous hair tends to absorb color more quickly, which can lead to a deeper, more intense result.
* Underlying Undertones: Understanding the undertones in both the green and purple dyes can help predict the outcome. For example, a green dye with a lot of yellow undertones mixed with a purple dye with red undertones could lean towards brown.
Recommendation:
* Strand Test: Before applying the purple dye all over your hair, it's essential to do a strand test. Apply the dye to a small, hidden section of your hair to see how it reacts. This will give you a better idea of the final color and help you avoid any unwanted surprises.
* Color Remover: If you're unhappy with the green color, consider using a color remover specifically designed for hair dye. This can help lift the green pigment and provide a cleaner base for the purple dye.
* Consult a Professional: If you're unsure about the best approach or want to achieve a specific color result, it's always a good idea to consult with a professional hairstylist. They can assess your hair and recommend the best course of action to achieve your desired color.