For a lot of coverage, start with a solid tank that matches one of the colors in the blouse, then add a jacket or cardigan.
To be moderately revealing, try a skin-toned camisole or bodysuit that will seem to disappear under the shirt.
Go risqué with just a lacy bra (not the everyday T-shirt kind). Choose a contrasting color if you're feeling extra bold. The waistband of your pants should hit the hips, no higher.
A classic paisley peasant blouse gets an update in gossamer silk.