A tutorial demonstrates how to build a React app using styled-components to create a theme-switching feature, showcasing quotes from "Game of Thrones" characters. This guide covers setting up a React environment, creating styled components, and implementing multiple themes that can be switched with a button click and stored in local storage using the ThemeProvider component. It explains how to pass theme objects to styled components, manage themes using the React Context API, and employ the useState and useEffect hooks for dynamic theme switching and persistence. Additionally, the tutorial explores advanced techniques for overriding themes by nesting ThemeProviders or directly passing themes into components, ensuring flexibility and customization in theme management. The tutorial is complemented by a detailed walkthrough on GitHub and encourages using LogRocket for modern React error tracking.