Hello Mia – great idea separating spaces on your balcony!!!!!
Okay, so your colours are white, medium brown and green right now. I would add some pink or/and yellow, grey, copper 🙂
if you put some pillows and blankets on the chairs and bench the green maybe doesn´t pop out any more. Or add poufs (creates cozyness) as another possibility to sit on… Perhaps your mom would accept a wooden board in shape of your table, which you can just lay on? Or some nice tablecloth 😉 Guess, by bringing attention to the balkony accessoires the green wouldn´t be so dominant.