RedBlue

Redblue is a term used primarily as a compound descriptor for the juxtaposition or blend of the colors red and blue. In color theory and design, redblue palettes are common for high-contrast combinations and for conveying energy (red) together with calmness or reliability (blue). In digital color spaces, mixing red and blue light yields magenta; in pigment, it tends toward purple, depending on hue and saturation. Designers use redblue schemes to draw attention, create visual hierarchy, or brand identity.

In political discourse, redblue denotes the red and blue political blocs in the United States, representing conservative and liberal constituencies. The term is often used when discussing polarization, electoral maps, and bipartisanship, and can describe debates that attempt to bridge red and blue perspectives.

In cybersecurity and risk management, redblue or red-blue teams describe adversarial (red) and defensive (blue) testing programs. Redblue exercises simulate real-world attack-and-defend scenarios to improve detection, response, and resilience.

As a brand or product name, RedBlue appears in various domains, including fashion, software, and media, typically as a two-tone or dual-narrative motif. The lack of a single canonical definition means redblue is most often defined by its context rather than by a fixed concept.