Here's the before:
An off-white blouse with some yellowing around the collar and shoulders. A basic khaki skirt.
The skirt dyed rust, with areas of light blue-gray (actually lighter than the photo). I had bundled some areas with rubber bands as a resist.
The first attempt at dyeing the shirt was pretty awful. It looked like a very pale chambray blue that had been used to clean up an oil spill.
So I over-dyed it with rust. It's still not great, but much improved from before.
And the 2 items sort of go together. They still don't fit though, so I'll see if someone else wants them!