A **bicolour** is a flag composed of two bands or fields of contrasting tinctures, with no further charge. Bicolours may be horizontal, vertical or divided diagonally. The form is older than the tricolour and persists in many national, regional and naval flags. A plain bicolour relies entirely on the choice and arrangement of its two tinctures for identification.
**Example**: The flags of Poland (white over red), Ukraine (blue over yellow) and Indonesia (red over white) are plain horizontal bicolours.
**See also**: [tricolour](/glossary/tricolour/), [horizontal-tricolour](/glossary/horizontal-tricolour/), [vertical-tricolour](/glossary/vertical-tricolour/), [tincture](/glossary/tincture/)