This is a forum. If you don’t get the joke, you can ask and have it explained to you. Most memes are some form of in-joke regardless, so you often have to do a bit of learning the first time.

What was off about your first comment was recognizing it for what it was before proceeding to miss the joke entirely.

What was off about your replies was trying to compare it to the Scottish coat of arms; if you know the Scottish coa, you probably wouldn’t associate it with piss yellow and white. If you don’t know it, you wouldn’t mix them up anyway.