She's laid 3 clutches for me since I bought her in '12. Last year she laid two clutches (one with a reverse O and a second with a hypo opal). Here's a pic of a male from the reverse O cross and he's significantly darker than any of his siblings were
http://postimg.org/image/kbb6h42j1/full/
I don't know much about red factor or redcoat but there's something going on for her to produce babies that are sometimes so vibrantly red like that. It could just be a one or two time thing for each clutch but I'm not sure. If I don't sell that adult Ultramel I'm going to breed her with the Ultramel blood in my avatar in hopes of capturing what's causing the extra "redness"
And for ultramels, when they are bred with anything carrying Amel either Ultra or Amel gets chosen and combined with the Amel; producing either Ultramels or Amels as a result. So for this last clutch there's one Ultramel that's has noticeably deeper colors than the other 3 Ultramels that came from that group