Ok so this girl dose not like me but i think that i was able to neutralize her. The setting was in my school but in the hallways whit both of us just there. It was a casual greetings kind of thing. And i felt her bra if that matters
You said the meaning yourself:
This girl does not like me but i think that i was able to neutralize her.
You learnt to be casual about her not liking you, seeing her as ok, and also got closer to her.
The colour red can mean warning or danger, or perhaps intensity or passion.
So maybe you calmed any alarm in you, greeting it with friendly passion instead. Not sure.
it's a girl you know, who wears a red scarf and a coat, you're replacing the face or the whole girl because you dont wanna admit the fact you have feelings for her..
it may also be completely meaningless