Interior Design Cheat Sheet

The core ideas of Interior Design distilled into a single, scannable reference — perfect for review or quick lookup.

PiqCue — piqcue.com/interior-design/cheatsheet

Quick Reference

Space Planning

The process of analyzing and organizing the layout of a room or building to ensure efficient use of available space, proper traffic flow, and appropriate zoning of activities. It accounts for functional requirements, user needs, and building codes.

Color Theory

The body of principles that governs how colors interact, how they are perceived psychologically, and how they can be combined harmoniously. In interior design, color choices affect mood, spatial perception, and visual hierarchy within a room.

Balance

A principle of design concerned with the visual distribution of weight within a space. Balance can be symmetrical (formal, mirror-image arrangements), asymmetrical (informal, achieved through varied elements of equal visual weight), or radial (elements radiating from a central point).

Scale and Proportion

Scale refers to the size of an object in relation to the space it occupies and to the human body, while proportion describes the ratio between the dimensions of objects relative to one another. Proper scale and proportion ensure a room feels neither cramped nor empty.

Lighting Design

The deliberate planning of natural and artificial light sources to serve functional, aesthetic, and psychological purposes. It typically involves layering three categories: ambient (general), task (focused), and accent (decorative or highlighting) lighting.

Biophilic Design

An approach that integrates natural elements, materials, and patterns into built environments to strengthen the human-nature connection. Research shows biophilic design reduces stress, improves cognitive function, and enhances well-being.

Universal Design

The design of spaces and products to be usable by all people, to the greatest extent possible, without the need for adaptation or specialized design. It encompasses accessibility for individuals with varying physical abilities, ages, and sizes.

Rhythm and Repetition

A design principle that creates visual movement and continuity by repeating colors, shapes, textures, or patterns throughout a space. Rhythm guides the eye and establishes a sense of cohesion and flow.

Texture and Materiality

The tactile and visual quality of surfaces used in an interior. Texture adds depth and sensory interest, and the juxtaposition of different materials (smooth, rough, matte, glossy) creates layered and engaging environments.

Sustainable Design

An approach that minimizes negative environmental impact through energy-efficient systems, responsibly sourced materials, waste reduction, and healthy indoor environments. It often aligns with certification systems such as LEED or WELL Building Standard.

Key Terms at a Glance

Ambient Lighting:General illumination that provides uniform, overall light throughout a space.

Asymmetrical Balance:An informal arrangement of different elements that achieves visual equilibrium through equal visual weight rather than mirror-image placement.

Biophilic Design:A design approach integrating natural elements into built environments to strengthen the human-nature connection and improve well-being.

Building Information Modeling (BIM):A collaborative digital process that uses intelligent 3D models for planning, designing, constructing, and managing buildings and interiors.

Color Wheel:A circular diagram organizing colors by their chromatic relationships, used to identify complementary, analogous, triadic, and other harmonious color schemes.

Contrast:The juxtaposition of different elements — such as light and dark, rough and smooth, or large and small — to create visual interest and hierarchy.

Elevation Drawing:A two-dimensional architectural drawing showing a vertical view of an interior wall, used to communicate the placement of cabinetry, fixtures, and finishes.

Emphasis:The design principle of creating a focal point that dominates a space and draws the viewer's attention first.

Ergonomics:The science of designing environments and products to fit human physical capabilities for optimal comfort, efficiency, and safety.

Floor Plan:A scaled, two-dimensional diagram showing the layout of a space as viewed from above, including walls, doors, windows, and furniture placement.

Focal Point:The dominant visual element in a room that immediately captures attention and anchors the design composition.

Harmony:The pleasing arrangement of parts that creates a unified, visually coherent whole in a designed space.

LEED:Leadership in Energy and Environmental Design — a green building certification program addressing environmental sustainability in design and construction.

Mood Board:A curated visual composition of images, colors, materials, and textures used to communicate the concept and aesthetic direction of a design project.

Negative Space:Intentionally empty or unoccupied areas in a composition that provide visual rest and define surrounding elements.

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