This is the biggest React based App I have built so far. I built this app by going through this course: The Modern React Bootcamp (Hooks, Context, NextJS, Router).
If you want you can check it out here: Color Picker
Clone the project
git clone https://github.com/samueldusek/colors-generator-react-app.git
Go to the project directory
cd colors-generator-react-app
Install dependencies
npm install
Start the server
npm run start