Flag of Thailand

Country

Flag of Thailand uses five horizontal bands with a double-width blue centre. Ratio 2:3, current adoption September 28, 1917 and design credited to King Vajiravudh (Rama VI).

Hoist Ratio 2:3 Fly

Flag Reference

Flag	Flag of Thailand
Entity Type	Country
Official Name	Kingdom of Thailand
Identifier	TH / THA
Region	South-Eastern Asia

Flag Specifications

Current Adoption	September 28, 1917
First Documented Use	1917
Proportion	2:3
Shape	Rectangle
Colours	Red, White, Blue
Designer	King Vajiravudh (Rama VI)
Construction	Five horizontal bands with a double-width blue centre

Documented Colour Values

Colour	HEX	RGB	CMYK
Red	#A51931	165, 25, 49	0, 85, 70, 35
White	#FFFFFF	255, 255, 255	0, 0, 0, 0
Blue	#2D2A4A	45, 42, 74	39, 43, 0, 71

Design and Symbolism

Red	the land and the people.
White	religion and the purity of Buddhism.
Blue	the monarchy.
Trairanga	“The tricolour” — blue was chosen partly because it was the colour of Friday, the king’s birthday, and partly to show solidarity with the Allies in the First World War.

Proportions

Ratio	2:3
Hoist	2 units
Fly	3 units

About the Flag of Thailand

Five horizontal bands with a double-width blue centre The recorded proportion is 2:3. Within this library it is grouped with horizontal multi-band designs.

Colours and construction

The reference palette stored for Thailand is Red (#A51931), White (#FFFFFF) and Blue (#2D2A4A). The colour table above is intended for digital reference; where an issuing authority publishes a different colour standard, that specification takes precedence.

Symbols and recorded meaning

Trairanga: “The tricolour” — blue was chosen partly because it was the colour of Friday, the king’s birthday, and partly to show solidarity with the Allies in the First World War.

History and adoption record

The design record traces first use to 1917. The adoption field for the present record is September 28, 1917. The designer is recorded as King Vajiravudh (Rama VI).

Additional flag context

The blue centre band is twice the height of the red and white bands beside it, and was added in 1917 partly to align the flag with those of Thailand's First World War allies.

The flag before 1917 showed a white elephant on a red field; the elephant survives on the naval ensign.

The current design is known as the Trairanga, and 28 September is observed as national flag day.

How to identify this flag

For quick identification, look for Five horizontal bands with a double-width blue centre, a 2:3 proportion and the visible trairanga. Use the comparison and design-family links on this page when another flag has a similar palette or layout.

Verification sources

Flags of the World — Thailand — Specialist vexillological reference

Other horizontal multi-band flags

See all

Facts about the Flag of Thailand

Thailand is recorded as five horizontal bands with a double-width blue centre.
The reference proportion for the flag of Thailand is 2:3.
The stored palette for Thailand contains Red, White and Blue.
The adoption field for this country flag record is September 28, 1917.
The design record traces first use to 1917.
King Vajiravudh (Rama VI) is credited in the dataset as the designer of the flag.
Its construction is grouped with the horizontal multi-band design family in this library.
Trairanga: “The tricolour” — blue was chosen partly because it was the colour of Friday, the king’s birthday, and partly to show solidarity with the Allies in the First World War.
The blue centre band is twice the height of the red and white bands beside it, and was added in 1917 partly to align the flag with those of Thailand's First World War allies.
The flag before 1917 showed a white elephant on a red field; the elephant survives on the naval ensign.

Frequently Asked Questions about the Flag of Thailand

What does the flag of Thailand look like?

Five horizontal bands with a double-width blue centre, with a recorded proportion of 2:3.

What proportion is recorded for the flag of Thailand?

The reference proportion stored for this flag is 2:3.

Which colours are recorded for the flag of Thailand?

The reference palette lists Red #A51931, White #FFFFFF and Blue #2D2A4A.

What do the symbols on the flag of Thailand represent?

Trairanga — “The tricolour” — blue was chosen partly because it was the colour of Friday, the king’s birthday, and partly to show solidarity with the Allies in the First World War.

When was the present flag record for Thailand adopted?

The adoption field in this record is September 28, 1917.

Who designed the flag of Thailand?

The designer is recorded as King Vajiravudh (Rama VI).

Which design family does the flag of Thailand belong to?

WorldFlags.online groups it with horizontal multi-band designs for visual browsing; that classification describes construction, not necessarily historical ancestry.