I had to search to see what you meant by "magenta yellow". My immediate assocation was with the two of them having identical color schemes (although also both b

I had to search to see what you meant by "magenta yellow". My immediate assocation was with the two of them having identical color schemes (although also both being immediately recognizable). I haven't seen the actual radiation symbol often in practice other than in medical facilities or on trucks/trains. Faded fallout shelter signs were ubiquitous on buildings in my childhood (the 80s), so in that regard there's little room for confusion.