Flag of the United Kingdom
CurrentSovereign stateISO GB · GBR
Colours
No official specificationNo official source specifies these colours. The figures below are conventional values in wide use.
| Colour | HEX | RGB | Pantone |
|---|---|---|---|
red | #C8102E | 200 16 46 | 186 |
| Widely used approximation · See United Kingdom: Union Flag or Union Jack (flag record) | |||
white | #FFFFFF | 255 255 255 | — |
| Widely used approximation · See United Kingdom: Union Flag or Union Jack (flag record) | |||
blue | #012169 | 1 33 105 | 280 |
| Widely used approximation · See United Kingdom: Union Flag or Union Jack (flag record) | |||
Construction sheet
Three heraldic crosses combined: the red cross of St George on white, the white diagonal cross of St Andrew on blue, and the red diagonal cross of St Patrick on white. It is drawn 1:2 here, the proportion used at sea.
- Proportion (height:length)
- 1:2 at sea, 3:5 on land
Sources: United Kingdom: Union Flag or Union Jack (flag record); Union Jack
Sources
- Union Flag flying guidance for UK government buildings. UK Government (GOV.UK), 1 Jan 2026. Accessed 4 Oct 2026.
- United Kingdom: Union Flag or Union Jack (flag record). The Flag Institute, 1 Jan 2026. Accessed 4 Oct 2026.
- Union Jack. The Royal Household (royal.uk), 1 Jan 2026. Accessed 4 Oct 2026.