Pan-Romance Colours

IOTL we have pan-African, pan-Arab and pan-Slavic colours and even the Central American combination of (light) blue and white.
I thought about which other pan-colours are possible. One of the best candidats in my opinion are the Romance speaking countries. We have already kind of a theme in OTL: vertical tricolors (opposed to "Germanic" horizontal tricolors). We even have two common colours in the flags of France and Italy: White and Red.

I think with a Napoleonic POD we could see some other flags with the same common features.

Red-White-Red for Spain
Black-White-Red for a generic Romance country (maybe Belgium, Romania, Sicily or Portugal).

I think if Spain would have gotten such a flag it would have been enough to get some common flag-theme going.

What do you guys think, plausible or not? And what other pan-colours could have been? Pan-Nordic/Germanic/Asian/Muslim/Turkic?
 
Pan-something colours are often issued from situations where the given population is either subordinated or at least feel like this, from a long time enough to have avoided the composition of too strong national identities at least partially (as in pre-unification Italy).

Thing is, romance speaking countries weren't particularly taken over, or minorised historically. Eventually, romance national identities had better appeal than a pan-romance identity.

That said. If it was about to get made, I would bet on purple/red - white - gold, not unlike IOTL Ossetian flag.
 
Hmm. Well arguably there already exists in OTL an association between the old White Dominions and Red-White-Blue as a colour scheme. The Nordics have their cross rather than colours, I don't really think there's enough countries for pan-German colours, though Black and Gold were somewhat used in this respect historically.

Theoretically if the Netherlands had stayed with Orange-White-Blue, then independent Belgium might have tried to appease her internal factions by adopting the Red-White-Blue variant that is used OTL (essentially being a more French equivalent).

White and Green were seen as Revolutionary colours in Switzerland during the 1790s, so perhaps you could see that become more widespread?
 
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