Duvet and Pillows

We received the new duvet and shams for the guest room. I think it is much more crisp and clean than the previous granny bedspread:


It is much more cozy with the comforter insert too! I'm wondering if I should leave the headboard white or spray paint it something quirky - like bright blue or lavender or yellow. Or a more tame grey?


I'm realizing we will need some pillows to accessorize - I think a mix-and-match grouping of solids and bold prints would keep it fresh:

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...and here

I'll be looking out for that perfect mix.

My go-to internet resources for pillows are Anthropologie and Crate and Barrel. In real-life I am all about Marshall's, TJMaxx, Home Goods. Any one have a favorite resource I'm missing?