My querry on this is the definition of “blue”
I remember the old original “Blue discs” which were a really nice
"Sapphire blue" color, but those old discs were SLOW burning
and have been discontinued for a decade or more.
I believe they used an “Azo” dye.
Then there were the “Blue-Green” discs like the T-Y made Sony “Audio” CD-R discs (discontinued) but are still made and sold under other brands.
I believe these are the “Cyanine” dye discs
Then finally there are the pthalo-cyanine dye discs that are
a pale green-gold color.
The old “Azo” discs were fantastic for long term stability but as previously mentioned were “creeping death” to burn and were
expen$ive. I have some Azo discs burned a decade ago that have been stored in my truck (parked outside in the sun) and those discs still play in my media-player.
But then again my vehicle media player will play CD-RW discs too, and as it will play any variety of DVD (including the elusive DVD-RAM discs) it isn’t exactly picky about what it’ll play.
THE thing to remember about the various discs is that unless there are burn tables in the firmware of the burner you want to burn them with the discs (And/or the drive) are useless relics.
last week I tossed two milk crates full of CD-RW drives, why?
because it just isn’t worth fighting with drives that don’t play nice with currently available discs… or Vice-versa