Here is the highest resolution photo of the nose art that I've seen. This nose art was applied to the aircraft at the Tulsa factory, having been the last B-24 built there.
https://scontent.ffcm1-2.fna.fbcdn....=b4ea8b5fec95a4659a5b4437ca2b88de&oe=5EDA0524
The letters would be red on a blue and white background of the scroll (the scroll outlined in black), based on the relationship to the tonal values as seen in the flag, where the red appears darker than the blue. That is the way it is depicted in Bob's repaint, and which I think is accurate.
There was a NOVA special on PBS a while back, about the discovery of the wreck of this aircraft in 2010.