I'd match the bar tape and bottle to the orange on the seat post if that's what I see there... but I'm currently working on a cardinal red paint job with gold detailing and white decals so my taste is suspect
I would keep it mellow, do some orange anodized rims, or water bottle holders and water bottles, maybe bar tape mixed black and orange, but I don't think orange bar tape would, by itself, look so good in a few weeks time. Nor would orange tires, I suspect. Maybe pedals as well, if such are available in anything other than BMX flat style pedals. Orange and black saddle may be good as well, but all orange might be a little loud.