Red, white and blue flags, but the blue is replaced with black (all sovereign state flags + some others) : r/vexillology
The best of /r/vexillology — Black-White-Red… Black-Red-Gold… WHY NOT BOTH from
The best of /r/vexillology — Flags for Every A-League Club from /r/ vexillology in 2023
Redesign for the flag of Portugal : r/vexillology
Union Jack - Wikipedia
Red flag (politics) - Wikipedia
I decided to join the trend, I've written down all the flag I've seen so far this week where I live : r/vexillology
50 Red, White & Black flags : r/vexillology
North American flags in the style of other North American flags. : r/ vexillology