The goal of accessibility is to design & code digital products, services in a way that users with disabilities are able to use them. Your context or temporary condition and limitation also affect the way you use a product.
Accessibility
Accessibility — UX Knowledge Base Sketches
Knowledge
How To Write Email Newsletters That People Actually Want To Read
The article is devoted to the issue of using various colors in user interfaces and branding design, associations and the influence of color choice on user behavior.
Colours
Color in Design: Influence on Users' Actions — Tubik Blog