Form & Composition
The legendary 'cube' or box icon designed with high-contrast tones for front-end prototyping.
Color Psychology
Solid black projects the authoritative, professional, and 'gold-standard' developer experience.
Design Elements
The 3D cube motif symbolizes the 'sandbox' or environment where creative code comes to life.
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CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets. It functions as an online code editor and open-source learning environment, where developers can create code snippets, called "pens," and test them. It was founded in 2012 by full-stack developers Alex Vazquez and Tim Sabat and front-end designer Chris Coyier. Its employees work remotely, rarely all meeting together in person. CodePen is a large community for web designers and developers to showcase their coding skills, with an estimated 330,000 registered users and 14.16 million monthly visitors.
Source: Wikipedia