What is a style guide?

A style guide is a comprehensive document that outlines the standards for design elements, ensuring consistency and cohesiveness in visual communications across various platforms and media. It typically includes specifications on typography, color palettes, logo usage, imagery style, and overall branding guidelines. This allows designers and stakeholders to maintain a uniform look and feel in their work, which is essential for brand recognition and professional presentation.

The other options do not accurately define a style guide. For instance, documenting a project's budget refers to financial planning, while project staffing requirements pertain to human resources and management. Presenting project outcomes relates to the results and effectiveness of a project, which is distinct from establishing design standards. Thus, the role of a style guide is specifically centered around design consistency and quality, making it the correct choice in this context.