Agreed, GF. I'd definitely go with a blue shirt, as it will provide more contrast and warmth than a white shirt.
I've got a couple of beige/light tan suits, one in cotton and one in wool, and I always wear them with sky-blue shirts unless I feel a bit more daring - see photo below:
(Henry Carter x Sozzi knit, Deer Style jacket, G.Inglese for Deer Style shirt, Herringbone pocket square.)
Yes, full marks to GF and Journeyman. I've been pairing that Formosa tan suit with pale blue shirts and so far, been happy. Contrast tie in a block colour with a bit of texture. Some form of brown shoe, or maybe burgundy.
, that suit looks a bit flat on its hanger, but I reckon you can make it pop. Looking forward to your pics.