My daughter has Aspergers Syndrome and likely will live with us for quite awhile. In our new house we gave her an additional room as a "sitting" room. She loves the painting and furniture but hates the builders Navajo white on the walls; says it's boring. Ideas? (Ignore stuff on settee, please!)

A fresh apple green would make the red accents really work well.

Lovely space. What colors does she gravitate towards and what makes her happy? I would create a room that makes her feel good. Are you looking to create a calming space or an invigorating space?

Blue's are calming

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Orange, red, yellow, etc. are invigorating colors:

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You can do a combination of both:

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Going with a really dark color on the walls will create a cozy feeling where she could feel safe:

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She said doesn't like the neutral that is there now. Go with a color. The turquoise suggested above is another color that would work well with the Reds.

I was matching the chair and chest and forgot about the picture. Here are some colors based on one side of the room. Not sure if they'll work with the picture though. I'll try out more colors in a bit.

I checked the color wheel, seems like you have two complementary colors going on (red orange and bluish green). I would go with any color that is two major shades removed from your primary colors, which are: yellow-orange, red-violet, blue-violet and yellow-green. Choose from those color sub-categories for the best aesthetic. I personally think that the yellow-green family would look the best in your daughter's sitting room.

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Here you can see the orange and blue elements playing off the lime green color in a nice way. The walls don't have to be intense. It could be a subtle, pastel yellow-green color.

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BM's Guilford Green might be nice. Calming, warm and complimentary to her various shades and colors.

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I think Maureen may have nailed it!

Here is SW Softened Green or Cascade Green on both sides of the room:

My son has that disorder & he likes blues. It calms him. Whatever is your daughter's fave will work.

I just use Sherwin Williams Visualizer: https://www.sherwin-williams.com/visualizer/#