Dark patterned shirt/blouse

[DelphiniumBlue]

I'm trying to find a top which works with black jeans and a black blazer. So not wide sleeves, not boxy, not crew necked and not pastel. Not sheer or synthetic either. I like dark blues and reds, but in my mind's eye I'm seeing something patterned with a black background - or could be a coloured background with black in the pattern.
I've looked at Boden, M&S, Violeta, Debenhams, and supermarkets- don't where else to try! I'm a short bodied, busty 18 with Winter colouring, and would like something at least crotch covering length.
Ha anyone seen anything which might fit my ( very fussy) requirements?
Would pay up to about £50.
TIA

No-one?

Still hoping for suggestions....

TK Maxx have dark navy shirts with a small lighter pattern on them. Saville Row range for women. I saw one yesterday and am popping in on pay day to get one. Not sure how long they are though.

You've thrown me with the length but Pepperberry have a nice blue one with small navy flowers. Might be too worky maybe.

Thanks, guys - I'd given up hope of any replies!
Will check them both out.

viscose but maybe something like this there was a short sleeved version with a slightly different pattern in store that is quite long on so should be crotch length but can't find it online

H&M have a few. This one is 75% cotton.
m2.hm.com/m/en_gb/productpage.0262285024.html#