Organization is one important factor.
Another factor to consider is sensory processing and/or sensory overload.
There are plenty of articles on interior design and mental health and/or productivity.
However, I am only able to find those articles are in interior design sources… not mental health or productivity journals.
I have read articles that say, “This color increases productivity 10%.”
I have never seen a business say, “We repainted to this color and our productivity went up 10%.”
Take with that what you will.