Just working with the two parameters of Ivoire and wanting a medium shade of brown or a tan...

Lots will work with Ivoire! :~D

I personally like a little green slant to a "brown" with Ivoire - something like SW Artifact and Relic Bronze. Also from BenM Jamesboro Gold. I'm on a J.B kick these days, dunno why. I think it's feeling very updated and chic to me at the moment. There's also Tamarind AF-120 from the BenM Affinity collection.

I'd go a dark chocolate with a cooler, bluer edge to it with Ivoire if we stayed in the browner category. I just have thing about a truer brown, chocolate with golds & yellows. It's an unattractive association for me but it depends on what else is with the combo.

My own house for example is a double order of SW baquette with a custom med-dark chocolate trim, but the tiled roof is redish umber, as are the water spouts and the stained patterned drive and sidewalks. So with the addition of the reddish umber, etc. I don't get the same vibe from the yellow and brown combo.

YMMV. :-D

I think the darker SW shades in strips 20-23 would work well with the Ivoire as they have a green slant, as mentioned by funcolors. I don't think pinky/peachy browns would blend as well.