Reply To: Border effects in Indesign

Well, no, in this case you can't. The image needs to be a monochrome image in Photoshop – a bitmap. In that mode, you cannot have other colors than black and white (and certainly not transparent).

these are just color fills, in InDesign

and I meant precisely that. If you select a monochrome bitmap in InDesign with the white arrow, you can change the 'foreground' (black) and 'background' (white) colors by changing the Fill and Stroke swatches of that image. It's been a while since I last used this, but it might even be ID automatically sets “white” to transparent on placing a monochrome image, so you only have to set the black parts to use a white (Paper) swatch.