We’ve seen the crest of Elturgard in the Sword Coast Adventurer’s Guide on some Armour, but what would the colours of it be on a flag? I can’t seem to find that information and I’m making my own flag for it currently. Thank you! 1)
The larger sun (the circle, on the right) is scarlet (light red/flame red), and the rays of the smaller sun (including the two larger, vertical ones) are canary-yellow with a thin red outer border; another thin red line, like…#Realmslore

— Ed Greenwood (@TheEdVerse) November 29, 2020

2)
…that outer border, outlines the central circle of that smaller sun, which is a very faint yellow (in some depictions, white) in its interior. 3)
However, that’s its full-on detail, as done on flags and banners. It’s far more often depicted as a simpler badge, all in gold, as seen on p65 of Baldur’s Gate: Descent Into Avernus.#Realmslore

— Ed Greenwood (@TheEdVerse) November 29, 2020