Design Kit is an open source platform that anyone can use to learn and practice the methodologies of human-centered design (“HCD”). The tools are divided into methods, or ways to practice HCD, and mindsets, or ways of thinking about HCD. Working with a multi-disciplinary team of interaction designers, writers and developers at IDEO.org, I helped to define the visual language and digital presence of the platform. This included developing an illustration style for Design Kit's methods for human-centered design, establishing a color palette and making decisions on website layouts and content. Key to developing the system was staying consistent with the IDEO.org brand, yet still creating a unique identity and visual style for the platform.