The flavor of the sauce 'blends well' with the fruit. [=the sauce and fruit taste good together]
wool and cotton 'blends' [=fabrics that are made of wool and cotton woven together]
The fish settles on the sandy ocean bottom where it 'blends in' perfectly.
(..) You were very dashing. I liked the mascara. But the first time I saw you was in the elevator. Really? You don't remember? I guess you do kind of blend in, huh? Did I scowl at you? No, you smiled. I did? Yes, it was a complete accident. A freak. I haven't seen it since. Bigger. Yeah, big... big... (..)2003 Lost in Translation