What is a style guide?

A style guide is fundamentally a document that outlines design standards for a particular project or organization. It serves as a comprehensive reference that establishes consistency in visual and interactive elements across different platforms or products. This includes typography, color schemes, layout principles, iconography, and the overall tone of voice. By adhering to these standards, designers ensure that usability and branding are maintained, leading to a more cohesive user experience.

The other options, while related to aspects of design or project management, do not capture the full essence of what a style guide is. A chart of project timelines pertains to scheduling rather than design principles. A list of all available colors might be a component within a style guide, but it lacks the broader context of guidelines for overall design application. A collection of user feedback relates to usability testing and user research, which is separate from the structured standards that a style guide provides.