Paul Moss
Is correct. Squirt bottle with baking soda, mix, shake, mist and walk away. It could though require a second application.
So if you care to know what caused the problem? The answer is,,,,,,, drum roll.
The fact that the cushions are down filled. That's right. Law requires that a flame retardant be applied to the casing that hold the down feathers, so the acid from the flame retardant leached to the surface fabric and created the red/pink hue. The baking soda mix will neutralize it.
Good Luck! You'll be fine, and it'll turn ok.