The furniture, maple with honey brown finish, wood and slate walls, limestone floors and richly colored carpets were the original designs of Graves' office. Denver's altitude forced a careful consideration of the usage of natural light. A striking western sun had to be carefully controlled to protect the library's collection, while the other sides of the building were designed with high ceilings and skylights, allowing for maximum light penetration in order for the structure to maintain efficiency year-round. In order to maintain the traditional feel of the interior, the firm designed mechanical systems and wiring patterns that could be easily masked by interior architectural details. Additionally, computer work stations appear rather traditional, but feature hidden raceways and cable routes through the furniture and floors.
Noise control is an essential concern when designing a library.
In addition to carpeting, study areas are equipped with acoustical panels which not only control noise in the areas with high ceilings, they also provide textures that contrast with the smooth wood finishes. With two below-level floors and five above, the firm decided to take advantage of height by opening up the spaces. It was important that it came across as a primary civic building with easy access for the public. The circulation area, the Great Hall, for example, is an open space with stone floors. It seemed appropriate here.