It's looking good! I'm going to reiterate my critique about some of the shelf contents: they still feel too high-contrast, mostly because of the golden bits on the books.
Here's an edit where I changed the gold lines on the books to be the next lightest brown rather than the bright wood highlight colour, and I made some very simple colour tweaks towards purple:
I say "simple" despite the extensive change because I used Photoshop trickery to achieve it, and only hand-edited 4-ish of the colours.
1. Select all the shadows so that darkest colours are most selected and the lighter colours are less selected (i.e. not a binary selection). In PS, I used Select -> Select Range -> Shadows, but there are several ways to achieve this, and it can be done in other programs too.
2. Fill that selection with your desired shadow-shift colour on a new layer. In this case, that was purple. Set the layer to Hue or Color mode (whichever you prefer; I used Hue in this case). This makes all your shadows progressively purpler.
3. Set the opacity to taste, probably pretty low.
4. Repeat steps 1-3 for the highlights, using the opposing colour (I used yellow). The opacity might need to be different; I used a higher opacity for this one than for the purple.
After that, I manually tweaked the greys on the fireplace and the wastebasket/boiler (the latter two use the same colours), mostly since greys aren't affected much by Hue blending, which doesn't change saturation. I replaced the darkest greys with various purple-browns from the wood. I also tweaked one of the mid-browns on the wood because there was too sharp of a jump between warm brown and purple-brown, so I tweaked its hue to be a little more purple.