Capital

Muscat

Continent

Asia

Flag adopted

1970(r1)

Designer

Not individually credited

Oman

Colors and meaning

• Red(r1) #DB161B

  The colour of the former Sultanate of Muscat and Oman; the battles fought to evict foreign invaders(r1)

• White(r1) #FFFFFF

  The Omani people's conviction in peace(r1)

• Green(r1) #008000

  The fertility and greenery of the land(r1)

Symbolism and history(r1)

A red hoist band bearing the national emblem, a khanjar (a traditional curved dagger) over two crossed swords said to date back to the 18th century, sits beside horizontal white and green bands, introduced in 1970 after Sultan Qaboos took power.

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”.

• 
  Suriname82

  the same horizontal band layout; the same colours in similar amounts.

• 
  Hungary80

  the same horizontal band layout; the same colours in similar amounts.

• 
  Iran80

  the same horizontal band layout; near-identical colour proportions.

• 
  Chile79

  the same horizontal band layout; the same colours in similar amounts.

• 
  Poland79

  the same horizontal band layout; the same colours in similar amounts.

• 
  Jordan78

  the 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.

Further reading: Flag of Oman on Wikipedia