why can't you use "quelli"?
should rosa agree with the noun (cuscini)?
Rosa as an adjective (the color) is invariant; as a noun it means "rose" and is feminine.
same with blu, that colour doesn't change either
Would 'ovunque' work here instead of 'dappertutto'?
Shouldn't those be pink cushions rather than pillows?
What was she to to?!!
Why" she was putting"? To me, "She would put those pink pillows everywhere", sounds more natural. "She would put" sounds as if I were reminiscing about a dear aunt or grandmother when she was still alive. Is "she would put." incorrect?