1. High-Contrast Color Palettes: Ensure body text maintains a contrast ratio of at least 4.5:1 against its background (3:1 for large text). Avoid relying solely on color to communicate visual state changes or form errors.
2. Keyboard Navigation and Focus States: Every interactive element—including navigation links, accordions, and custom form controls—must be fully accessible using the Tab key, accompanied by clear, visible focus rings.
3. Semantic HTML Structure: Use proper HTML tags (<header>, <nav>, <main>, <article>, <footer>) and logical heading hierarchies (<h1> to <h6>). This allows screen readers to navigate site structure effortlessly.