both of these have pink undertones

Here's shaker Beige:

have you looked at White Sand?

or, what about Natural Choice?

I see more gray in that drapery material

IMO, any of these would work better than the beige tones

I did Light Pewter in my kitchen. I think it or Athena might be a nice match

try this one too:

I just used BM Pale Oak in a room with strong southern light. It's a little less warm than Feather Down. To me it doesn't look a bit pink. What I had before (from the previous owners of my house) did look pink. It is very neutral. I had to eliminate a couple colors that looked green and yellow in the light I have. But ultimately the only way you're going to know what will work in that room is to sample. I agree with everything Beth said about the beiges and grays. Based on the fabric you show you should be leaning more gray and in a southern exposure grays won't look as gray as they would in other types of light.

I have Feather Down cupboards. here is a photo beside those cupboards. As well as the swatch on the current Dufferin Terrace Wall. I didn’t see the grey tone. But could be!?

A great color for south light is B.M. Horizon. It has just enough gray in it to balance the warmth/yellow light.

Hush is going to show yellow with south light and Shaker Beige could show orange.

warm grays. I wouldn't use either of the beige colors.

but go get some samples and paint them on your walls. only way you're going to know. (or get Sampleize)

Stop looking at beige paints. You need to be looking at gray paints.

Pivot!

I agree the beige is not working at all.Get a tester of Athena