both
blue
tom
light brown hair
It all depends on the guy. Look at recent girls they've dated or celebrities that they like to find out :)
Light/Dark Brown colored hair.
I think he will like you as long as you have a good personality are confident and aren't obsessed with your self. I am sure he likes girls with dark hair and light hair and dark eyes and light eyes.
You can use natural ingredients - Lemon Juice - to lighten Coffee - to darken Tea - darken if you got light hair / lighten if you got dark hair.
If you have dark hair and wearing blue with light skin, get a tuquois and wear it with a silver. If you have dark skin and dark hair, wear electric blue with bubble gum pink. If you have light hair and light skin, wear pastel blue and white or light brown
you have to light your hair with a lightener which will prob damage it a lot.
dark brown
It depends on what shade your hair is. Light pink goes well with some brunettes, usually with lighter hair; dark green for others; pink goes well with people who have black hair; other times, ocean-blue works better.
Light hair is way easier to dye than dark hair is. So the answer is yes. Just go to the store and there will most likely be hair dye there somewhere. Good luck.