OK, so I didn't exactly get what I was looking for ... but I found matching blue fabrics ...
Here you see:
- two sheets, middle and darker middle blue
- a pillow case (with a duvet cover off to be ironed) in blue-greenish stripes and flowers
- 10 inches of blue and darker blue patterned fabric
- approx five feet of darker middle blue with lighter coloured dots.
I've started washing and will iron and cut tomorrow, hoping to be able to pin it to the design wall so: continue to watch this space!