Wait for the mason that can do it properly. I removed about 1/4 of the brick on my home as part of a massive remodel and you can’t tell now that it’s complete.

Part of this is old brick part is new.

My family home had an obvious brick patch to fill in a wall air conditioner hole. I was inspired to check it out of Google street view just now and I see after all these years the new brick in no longer too light... it is now too dark! There must have been a few sweet years there as it changed color or maybe someone tried to darken them at some point??

Your fear are well founded.

I have no advice on your brick, but for your utilities I had the same issue, and spray painted them all with brown camouflage spray paint. The camouflage is an especially dull finish, no shine at all. I put pieces of cardboard behind the wires and pipes as I sprayed. Looks so much better. The only thing I didn't spray was, of course, the face of the meter. I checked on my local utilities website and they said it was OK.

Your utilities have to be open for reason like reading them and access . I need to see the whole house to help with this area. Post the pics here in a comment DO NOT sart anothe rpost. Waht is the plan for the back of the house . like are you doing an outdoor kitchen or seating on a deck or patio ?

It appears that you turned a door into a window?? Is there another door for the back yard? If not, is there anyway, you could turn that back into a door?

How about window boxes and some sort of decorative wood panel over new brick? Just saw it today on a house on my way home.

In addition to matching the brick (which doesn't look that unusual, but there are a lot of bricks), you'll want them to move the brick window ledge for the middle window. Get a mason -- probably nobody keeps photos for jobs like this, but that doesn't mean they can't do it. Check the brick they use, and/or have them mix in some of what you can salvage, but otherwise just brick it up and move on. Plant a fluffy shrub to the left of the A/C condenser, which will draw they eye from both utilities and brick. You don't want to block air flow to the condenser, nor to block access to the utilities, but a shrub where the door was and a nice planter under the meter should both work nicely.

You're never getting a cost effective match. Make contrast your friend and come up with plan "B" please.