I don’t know if either bleed but if your worried about it there’s always white. I have had mono running bleed before. All of my reels are old and don’t show backing at all. Hope someone can enlighten you more then myself.
Just make sure to wash in cold water with like colors.
Fish slime will probably help with that, like colorfast detergent!
I did have some some redish Dacron (extra dark orange?) that was labeled SA #30 that bled quite a bit. It was sound, but a bit messy. But the backing was suspiciously wound from a monster spool onto a separate smaller spool, and labeled by hand, not to mention purchased on eBay, and not from one of the big shops. Since I never had any issues with any other backing from SA I’m going to have to classify that data point as a possible aberration.
Still, it sounds like that could possibly be what you are looking at.
As I recall several years ago I had some dark orange dacron that bled onto a few saltwater reels. I have reels with blue and flo yellow (SA) and no issues. Only have green Power Pro on one special reel that needed more capacity - no bleed that I can see with it. Although the colored lines are "pretty", since the orange bleed, it's been the plain Jane white (SA) for me.