Remove decals from wheels. Get tires with black sidewalls. ( the vintage threads look out of place ) cages aren’t bad, but if changed, use something aero, modern, and similar finish to frame finish, matte on matte-gloss on gloss. Blue tape is hard to make work. Can be done (Fizik Metal Blue maybe?) On this Bike a little blue is going to look like a lot and may result in more of a tritone instead of an accent. To put it another way, may look like a red, white, and blue bike instead of a red and white bike with some blue highlights. If you wanted to add color, I’d probably lean toward adding red (saddle, tape, cages,). If you are up for it bring the blue back in a tad with Jagwire cable housings.