I'm glad you kept this shirt - it suits you. You pull off white & blue well!
If it helps, the only reason I have *any* neutral blouses right now is for interviews - & even then, they're pussybow blouses (so not completely 'plain' either)! One cream & one milk chocolate pussybow blouse are enough to cover this need - the rest are in bright colours, like marigold or lipstick red. So I may be ever so *slightly* biased, haha