Edward tells Bella that he likes her blue blouse(spell check) on her when they are at the restaurant after he saves her from the men in the ally way. When Bella went with Jessica and Angela to get dresses.
It's blue... after Bella wears a blue ব্লাউজ one দিন and then she wears it to meet his family... Alice also buys Bella a blue outfit for graduation as she knows Edward likes Blue on Bella :D