As discovered by alphabetacanary here:
If we omit the pattern which we know can't be part of the private key, that leaves 380 bits. However, the color encoding part contains 304 bits which is just enough to encode 38 bytes (the right number for an compressed wallet import formatted key).
I tried this in all possible combinations. What I get are beautiful strings but none of them is a valid key (I wrote a script to check that).
So also here is the question: Where to start? I tried to rearrange the sides so that the discovered patterm still matches but no luck.
The pattern always breaks somewhere.
It was mentioned, that we should start at the bottom left edge becuse the symbol there is in flames. Tried it, pattern breaks.
Then I tried to use this symbol as guideline on how to read the sides. It is anticlockwise and goes round like "top, left, bottom, right, top, left, bottom (right)". I also tried this. Pattern breaks - also no valid private key.