I'd pick colors from the stripe in the arm chairs.

On my monitor it looks like the pillow you already have work.

Yes but I need change a little, because a pass for divorce and everything remembers.

https://www.wayfair.com/decor-pillows/pdp/gracie-oaks-sharnea-chenille-lumbar-rectangular-pillow-cover-w010992523.html?piid=1669020943

Do you need pillows on the sofa for comfort? I think the sofa would look fine with no pillows.

Currently, you're pillows seem to go well with the artwork. If you're looking to just do neutrals, then look to the rug and chair for some other neutral colors to go with what you already have. Notice the pillows in both of our designs below:

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