Blue goes well with... Well. Blue.
The key is to vary shades.
When I planned this look, I started with the top. I knew I wanted to wear this shirt and as you can see, it has blues and white on it.
I immediately thought of my ripped jeans which are a lighter shade so I thought I'd 'monochrome it' by accessorising it with pale blue (so pale it looks white) flats and white jewellery plus this big blue 'ish' bag.