Nigeria
What the source says
Referenced, awaiting primary-source reviewOfficially adopted at midnight on 1 October 1960. Green stands for agriculture; white stands for unity and peace. In 1959, out of almost 3,000 entries, Michael Taiwo Akinkunmi won the competition with an equal green-white-green with a 16-ray red quarter sun on the white stripe; after acceptance, the committee removed the red quarter sun.
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 green-white-green vertical tricolor with no emblem; the winning competition entry originally carried a 16-ray red quarter sun on the white stripe, which the committee removed, adopted at independence in 1960.
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”.
Pakistan86the same vertical band layout; near-identical colour proportions.
Algeria80the same vertical band layout; the same colours in similar amounts.
Italy78the same vertical band layout; the same colours in similar amounts.
Ireland77the same vertical band layout; the same colours in similar amounts.
Zambia72the same vertical band layout; the same colours in similar amounts.
Madagascar70the same vertical 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 Nigeria (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 Nigeria on Wikipedia
