I love rainbows. And silk shirts. And I love quirky clothes, and dark colours mixed with brights. I also have a figure similar to yours.
So in theory, I should love that shirt.
But there's something just a bit... wrong... with it. I am a designer so I am very fussy about graphics, imagery and balance, so I am probably overthinking it, but there's something a bit cheap and crap-looking about the arrangement of the rainbows. And they're all floating about in a bit of a disjointed manner.
I can't say what it is, but there's something a bit naff and... 'obvious' about the rainbows, like they've been stuck on randomly by a five year old.
But at £200, it is a shirt worthy of over-thinking! 