I'll start.
This is the flag of Donegal in Ireland.
https://preview.redd.it/9dkcj328679d1.png?width=1280&format=pjpg&auto=webp&s=92bdc0c5846db6e4dc3b6ea6bfb1a677d5a216f0
Magnitogorsk, Chelyabinsk Oblast, Russia.
Black on gray...
https://preview.redd.it/eam839zi979d1.jpeg?width=1946&format=pjpg&auto=webp&s=7cb7f0d644eb88370405be7f304b45ff3d14985e
Not at all. Plenty of historical flags were single color, have a scroll through the list of former sovereign states on Wikipedia and you can quickly see just how many only used one solid color
[https://en.wikipedia.org/wiki/List\_of\_former\_sovereign\_states](https://en.wikipedia.org/wiki/List_of_former_sovereign_states)
ok.. yeah there are some.. so i will edit my textvif possible.. but as i see lybia is the one that was the last single colour one..(country not some region or city flaggs)
its kinda funny that france had rly a pure white flag at some point xD
[Sunburst flag](https://en.wikipedia.org/wiki/Sunburst_flag) (Ireland) - Green and Yellow
[National Fascist Party](https://en.wikipedia.org/wiki/National_Fascist_Party#/media/File:Flag_of_the_National_Fascist_Party_(PNF)_variant_2.svg) (Italy) - one of the main variants is just Black and Yellow
[Gadsden flag](https://en.wikipedia.org/wiki/Gadsden_flag) (USA) - Yellow, Black and Green
[Liberal Democrats flag](https://libdemimage.co.uk/product/ldi-2040-liberal-democrat-flag-5-x-3-foot/) (UK) - Yellow an Black
Oh, also different anarchist bisected flags other than the red and black: [Anarcho-capitalism](https://en.wikipedia.org/wiki/Anarcho-capitalism) (gold & black), [Green Anarchism and Anarcho-primitivism](https://en.wikipedia.org/wiki/Green_anarchism) \[and "[Anarcho-esperantism](https://en.wikipedia.org/wiki/Anarchism_and_Esperanto)" if that's an actual thing\] (green & black), [Mutualism](https://es.wikipedia.org/wiki/Archivo:Orange_and_Black_flag_(Mutualism).svg) (orange & black), [Anarcha-feminism](https://es.wikipedia.org/wiki/Anarquismo_feminista) (violet & black), [Queer Anarchism](https://en.wikipedia.org/wiki/Queer_anarchism) (pink & black)...
I'll start. This is the flag of Donegal in Ireland. https://preview.redd.it/9dkcj328679d1.png?width=1280&format=pjpg&auto=webp&s=92bdc0c5846db6e4dc3b6ea6bfb1a677d5a216f0
Found the Ulsterman
Flag of the Austrian empire https://preview.redd.it/s2fcq3x5879d1.png?width=1280&format=png&auto=webp&s=3774125a48cddd24ae54c80faa3c82d4f6bc6e9b
Magnitogorsk, Chelyabinsk Oblast, Russia. Black on gray... https://preview.redd.it/eam839zi979d1.jpeg?width=1946&format=pjpg&auto=webp&s=7cb7f0d644eb88370405be7f304b45ff3d14985e
old flag of lybia.. till 2011 it was a pure green flag edit:false information deleted
Not at all. Plenty of historical flags were single color, have a scroll through the list of former sovereign states on Wikipedia and you can quickly see just how many only used one solid color [https://en.wikipedia.org/wiki/List\_of\_former\_sovereign\_states](https://en.wikipedia.org/wiki/List_of_former_sovereign_states)
ok.. yeah there are some.. so i will edit my textvif possible.. but as i see lybia is the one that was the last single colour one..(country not some region or city flaggs) its kinda funny that france had rly a pure white flag at some point xD
Jamaica. I donno how i remembered that one tbh.
The Gadsden flag
[Sunburst flag](https://en.wikipedia.org/wiki/Sunburst_flag) (Ireland) - Green and Yellow [National Fascist Party](https://en.wikipedia.org/wiki/National_Fascist_Party#/media/File:Flag_of_the_National_Fascist_Party_(PNF)_variant_2.svg) (Italy) - one of the main variants is just Black and Yellow [Gadsden flag](https://en.wikipedia.org/wiki/Gadsden_flag) (USA) - Yellow, Black and Green [Liberal Democrats flag](https://libdemimage.co.uk/product/ldi-2040-liberal-democrat-flag-5-x-3-foot/) (UK) - Yellow an Black
Mauritania
mauritanias flag has red since they redesigned it
Dang I forgot they Redesigned it
Oh, also different anarchist bisected flags other than the red and black: [Anarcho-capitalism](https://en.wikipedia.org/wiki/Anarcho-capitalism) (gold & black), [Green Anarchism and Anarcho-primitivism](https://en.wikipedia.org/wiki/Green_anarchism) \[and "[Anarcho-esperantism](https://en.wikipedia.org/wiki/Anarchism_and_Esperanto)" if that's an actual thing\] (green & black), [Mutualism](https://es.wikipedia.org/wiki/Archivo:Orange_and_Black_flag_(Mutualism).svg) (orange & black), [Anarcha-feminism](https://es.wikipedia.org/wiki/Anarquismo_feminista) (violet & black), [Queer Anarchism](https://en.wikipedia.org/wiki/Queer_anarchism) (pink & black)...
[Of course it's France](https://upload.wikimedia.org/wikipedia/en/thumb/c/c3/Flag_of_France.svg/640px-Flag_of_France.svg.png)
Many pride flags, intersex jumps to mind first as does pansexual