Mine is dark in the winter and light in the summer =D I found this on google :p
What chemical causes the change of the colour of our hair?
Answer
Causes of hair color changes?
Although there are a few chemicals which can contribute to causing hair to change color it is ussually unbalance water which is the primary source.
The color can help us indicate what type of metal it is from. Example: Geen hair is ussually caused by copper being disolved in the water. It precipitates out and stains the hair when we shower using a shampoo that is high in pH.
Your water should be tested for the folowing items:
pH, total alkalinity, calcium hardness, total dissolved solids, copper & iron.
What color is the stained hair?
To rid the stain from the hair find a shampoo that is known to be swimmers shampoo or one that is low in pH. Use often and it will disolve the metals bak into the water and rinse away down the drain. Use moisterizer to keep the hair soft and moist as you will probably wash the hair several times a day which will have a tendency to dry the hair.
Ok I didn't read that over and it's a load of poo!








I used to get greenish hair from swimming to much when I was younger, but let's not go there lol. Yeah, dark in winter light in summer which is pretty understandable with the sun.



