Surely a red sofa is very versatile, with all kinds of styles?! I, too, own a red cover for a sofa that used to be my "main" sofa - for me, it worked for lots of looks (and I get bored easily!). I put red with white/cream for a fresh look, using a white-painted rocking chair and both cotton and fur cushions. I used brown textured and knitted cushions and throws for a more rustic, winter look with beautiful woods. I used fresh greens in spring, with ribbons and red tulips. Bright rainbow colours when I wanted something lively. Red leather is fantastic with black and chrome. Gold classics go well, too, with variations in pattern and texture. Deep reds with light blues look fantastic and fun for families. I have tried all these things and used matching accessories, candles, flowers, ornaments, vases etc. from my wide collection to ring the changes! Enjoy...

I'm very new to succulent identification, but it looks like an echeveria to me. The only dark colored one I know of is black Prince but I don't think that's it. Hopefully someone with more experience can give their opinion as well.

Kalanchoe orgyalis. You might be tempted to feel the leaves but the fuzz rubs off. Edit: Aww... I was too slow ^

Beth You are most likely right, especially if you have seen the plant (I was not familiar with it before the search). And I know that there is incorrect info around too...that is why I checked more than 1 site. There are photos the of S. ternatum on both sites I linked to, and both say that it has pink flowers - seems to be incorrect. Googling just Sedum ternatum shows all green foliage and white flowers. Dave's garden is showing photos of S. ternatum with white blooms and green leaves, but fall color of leaves is reddish (not as dark as OP plant): -here- OP's plant looks to me more like Sunsparkler® Sedum 'Cherry Tart' -pictured here- I don't know if they have correct info either...