Coloring brown to blonde

I have medium brown hair and want to go maybe dark blond or strawberry blonde think it will look good?

Well, it's hard to say without seeing your picture. It has a lot to do with your skin tone and eye colour. If you have pale skin and blue eyes, it'll probably look very nice, but if you're tan, then you should stick with the brown, or else you'll look very fake. And nobody likes a poser.

I too have medium brown hair, mixed with grey. My ancestry is mostly Irish and I have very light skin with dark brown eyes. Strawberry blonde looks really great on me. I color my hair all the time, and tend to do most any natural looking red. In my opinion, dark skinned people look great with red or reddish hair, so you might want to experiment. I think Clairol has a site where you can check out what color your hair will look using their specific products and colors.