What are your other favorite colors as this could use one more color at least. I like the idea of a tan and cream rug, tan and dark blue are gorgeous together. I'm not feeling the stripes but others may not agree. Of the three rugs I like A as it's more subtle and it mimics the pattern or your dining room rug. I love the Ikat curtains. Pillows and artwork will bring every thing together.
It's going to be beautiful, I like your choices so far.

Thank you for the reassurance and input. I failed to mention Im doing bamboo blinds with the curtains (beach house) as well as dining windows (also shade of light wood dining set) which made me think of possibility of bringing in a more tan/beige since the adjacent kitchen (open floorplan) all white cabinetry so little wood / natural color otherwise and tan/beige seems neutral.

I really tried to avoid navy overkill, went neutral on walls and ended up with just navy stove in white kitchen, navy rug in dining area and navy sofa set plus the blue in curtains. Its more a them carried thru the house then overly blue rooms which seems to make it less special.

Here I pasted curtain on room pic (they look very white because room is dim, cabinets actually bright white).

Sea grass and patterns in pillows and curtains, and additional color in plants or accessories. Love the last pic beryl posted.

I would do a plain tan rug against the navy sofas and let the drapes....I vote for the bottom pair....artwork, throw pillows stand out.

Love that last pic too! Getting that the blue in the rug not the way to go, like the idea of the tan, kind of the reverse of the tan-ish dining set on navy rug and not liking the couch pillows, could go for contrasting covers that would coordinate with the rug.
Thanks everybody!