How to create a “dark mode” version of a complex UI prototype with a single toggle switch?

Design & Visuals

This task explains how to create a WordPress 'tasks' post describing a dark mode toggle for a UI prototype. It emphasizes clarity and actionable steps.

Include design decisions, accessibility considerations, and a minimal set of steps to implement the feature without tool-specific dependencies.

Keep the tone practical, ensuring readers can reproduce the approach in their projects.

Who is this for?

- Product designers evaluating theme concepts.
- UI engineers implementing theme toggles.
- Design leads documenting best practices.
- Content writers documenting the approach.

Before you start

- Basic WordPress knowledge
- Familiarity with CSS variables
- Understanding of dark/light theme concepts

General Process (How it works)

  1. Define scope and success criteria Clarify which parts of the prototype switch themes and how success will be measured.
  2. Map affected UI components List components that rely on color tokens and ensure consistent theming.
  3. Choose theming approach Decide on CSS variables or a theme class that toggles across the app.
  4. Design accessibility considerations Ensure sufficient contrast and support reduced motion where applicable.
  5. Plan WordPress integration Outline how the post will document the approach and where to store references.
  6. Create minimal implementation plan Draft a concise, repeatable set of steps readers can follow.
  7. Validate visuals and behavior Test state changes across devices and verify consistency.

Common beginner mistakes

❌ Ignoring accessibility
❌ Not testing on real devices
❌ Hardcoding colors
❌ Forgetting to debounce
❌ Overusing global CSS variables
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