keith WJFFM, (although the coloured diagnostics do look kind of ugly, with anything other than the default Windows console colour scheme). If it annoys you, use the -fdiagnostics-color=never option, to disable it. I see nothing broken, so there is nothing to fix.
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Respected Team, I have tested the mingw 8.2.1 win32 on Windows OS and found that there is an issue after compiling any program. If a syntax error occurs, the color of cmd prompt becomes white. As this seems to be an issue with your programs (gcc and g++). Kindly fix it.