Estonia
What the source says
Referenced, awaiting primary-source reviewFormally adopted on 21 November 1918; formally redeclared as the national flag on 7 August 1990. The blue stands for the blue sky above Estonians, the black for the attachment to the soil of their homeland, and the white for purity, hard work and commitment. The first such tricolour flag was made in the spring of 1884 and consecrated at Otepää.
Referenced, not verified: a secondary work states this, and the document that constitutes the flag has not been read for this entry. What the marks mean.
Colors and meaning
Symbolism and history(r1)
A plain blue-black-white horizontal tricolor, first made by an Estonian student society in 1884, adopted as the state flag in 1918 and redeclared the national flag in 1990.
Most similar flags
The 6 closest of the 194 other national flags, ranked by a similarity index computed from the flag images themselves. The number is that index, 0–100 — not a claim that the two flags are “X% identical”.
Thailand73the same horizontal band layout; the same colours in similar amounts.
Greece72the same horizontal band layout; the same colours in similar amounts.
Nicaragua69the same horizontal band layout; the same colours in similar amounts.
Uzbekistan67the same horizontal band layout; the same colours in similar amounts.
Luxembourg66the same horizontal band layout; the same colours in similar amounts.
Syria63the same horizontal band layout; the same colours in similar amounts.
Computed at build time: each flag is rasterised to 64x48, and the score is 0.55 × colour overlap + 0.45 × structure. A different weighting would rank these differently. How the index works.
References — not verification
(r1) Referenced to Flag of Estonia (Wikipedia (English)) on 2026-07-17. States the adoption year, which colors the flag has, what the colors mean and the symbolism and history on this page. The passage it states them in is quoted at the top of this entry.
Further reading: Flag of Estonia on Wikipedia
