Love the rug and love your chairs! Don’t change them...I would add a non skirted English arm sofa in a herringbone tweed a mix of tan..ivory and black would be wonderful....I love black with light blue so you could add a new piece of art in a more modern abstract and replace your sconces with silver modern sconces maybe with black shades...

love this sofa from Pottery Barn

and the Kovacs sconces

Definitely keep the chairs and rug. I think you need a fairly high-backed sofa to balance the chairs. And light in colour. How about this, with a mix of throw pillows (not too many, I wouldn't obscure that back) in various depths of blue?

https://www.houzz.com/products/dhp-pin-velvet-convertible-sleeper-sofa-tan-prvw-vr~90726889

(It's a sleeper, which might be useful at some stage.)

For the door, you may as well hang a suitable curtain to improve thevisual effect.

The toile chairs would be perfect in the nook.

I love your idea for the space! Yes the chairs could go in the nook with a beautiful silver accent table...add two sofas facing each other I have that set up in my FR and love it..not many can do this layout so take the opportunity and do two! Would add a large square silver and glass table in a more transitional style to add a more modern touch t the space...love the light blue and golds..so pretty with touches of black! Here is my set up with the two sofas...

Yes looks good but need to update table! I would do silver and glass top....and pull them out just a bit more leave room between the backs and window for a more open not cramped look.

Oh, that is pretty. Nothing wrong with that table, although a more unusual one would be good as it would be the "art object" in that corner. Would you go for a pale blue throw pillow on each chair? If I wanted to do that I'd hunt out the perfect blue fabric and have the perfect pillow made -- soft, not too small, not too stuffed, and definitely not one of those stiff little numbers. Something that looks from the start as though it's provided comfort for years.

A round rug for that little setting might be nice if it works with the rest of the room.

I meant to mention up top how much I love the blue in your trim, and I think your colour scheme is just wonderful. I would look for somewhere to introduce a stronger yellow accent -- nothing too alarming, you understand. Soft but rich. A piece of porcelain, perhaps?

If you want to make changes for a more transitional style..that table needs to be replaced..it is all about mixing the traditional with some more modern pieces to give a transitional or contemporary look and style.

Would you ever consider painting the arms and legs of your chairs black? Would look amazing and really make the fabric pop.

The table is the perfect height and scale for the chairs. Maybe you could splurge and have a mirror cut for the top of it to add the right amount of sparkle.

I love your blue trim, but I would love to see a soft color on the walls. The chairs look great in the nook. The table is the perfect size. I'd paint it a color. And then I would play everything up with color and yummy sofas and a new coffee table. I'd find better sconces and art too.

I would do a tweed or herringbone with some ..black and ivory..I think introducing black into the space is what is really going to make that light blue and tan mix together and complement what you already have..your rug has already added a lot of deep tan to the space and the fabric on the chairs.

You could do a neutral ivory like your walls..and add light blue pillows...add lamps with black shades..would you paint the arms and legs on your chairs black?

If you want to keep it mostly neutral, here are a couple of ideas. I think the second one would really suit your space

Oh sorry M zinc...it is just such a pretty mix..

We wanted to share a few design ideas with you. In the first image we wanted to draw your attention to the chandelier and mirror.