Red and blue capsule design refers to the design of capsules that are colored red and blue. Capsules are commonly used in the pharmaceutical industry for medication. The design of capsules can include factors such as size, shape, color, and labeling. The choice of red and blue colors might be for aesthetic reasons, branding, or to differentiate between different types of medication. In design, the color theory plays a crucial role, where red and blue are primary colors with distinct psychological and cultural meanings.