The result of this project is a web application for children for learning colors and numbers. The application is designed to help children learn colors and numbers. The technologies used in its development are Eclipse IDE as development environment and Spring as framework for easier development. Server side is created using Java programming language while client side is created using HTML as markup language, CSS for styling and Javascript as script programming language in order to make web pages interactive. PostgreSQL is the relational database chosen for this project. Communication between server and database proceeds via JPA interface and port 5432 while client-server communication proceeds via HTTP protocol and port 8080 with assistance of RESTful API. AJAX calls within Javascript are used for fetching and posting data to a server. Hue lightning system is implemented as an additional functionality of this application which communicates with the application via Philips Hue API system and assists with taking the quiz. In order to be able to use the Hue system, the user needs to have a Hue bridge connected to the local network and apply at least one Hue bulb. The application has a form of a quiz which is accessed via one of the available web browsers. To access the application, the user has to create a user profile. After that, the user can access and use the application and its statistics.