Sweden

What the source says

Checked against the constituting document

Sveriges flagga är blå med ett gult kors. Korset är vinkelrätt ställt. […] Flaggans färg är ljust mellanblå på fälten och guldgul på korset.

[1] Lag (1982:269) om Sveriges flagga, §§ 1–3 (Sveriges riksdag), read on 2026-07-18. Backs which colors the flag has, the proportions and the description of the design on this page.

Checked means compared against the quoted text, not read by a person. What the marks mean.

Colors

Blue[1] #006AA7
Yellow[1] #FECC02

What the law specifies[1]

Lag (1982:269) om Sveriges flagga specifies that Sweden's flag is blue with a yellow cross set at right angles (§ 1), that the colour is light medium-blue on the fields and gold-yellow on the cross (§ 3), and that the proportions are 5:2:9 along the length and 4:2:4 along the height (§ 2), giving a 10:16 field.

Symbolism and history

A yellow Nordic cross offset toward the hoist on a blue field, inspired by the coat of arms of Sweden of 1442; the cross traditionally represents Christianity, and the current design dates to 1906.

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”.

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.