Match the rest of the siding an get rid of the red window color. No need for a feature at all as it does not add elegance at all. Just my .02.

It is not red color window. It’s teak wood finish alu profile. It’s look reddish in image.

All the windows shuold be the same color. If the reats are dark brionze or black, that window should be as well. No teak wood alu profile.

I think your problem is you have too many different feature sidings. You have the beige and reddish striped ones to the left of the door. You have the black marble below that window. You have the brown and beige on the balcony and the wood in the gable. None of the beiges go with your white siding. I'd simplify and unify. Personally, I think your house is elegant enough without any highlighting, but if you want something, pick one that goes with the wood in the gable.

Also, we don't know what you mean by "highlight wall" since the balcony and the first floor window are not the same walls.

You look like you live in place where it's easy to grow a lush garden and you have a lot of paved area. I'd pull up some pavers on the left and plant some lovely flowering shrubs. I might put a kidney-shaped garden island in the middle of your paver ocean, if you have the room.