'Chocolate' is lighter than mission brown so its not the same colour - having lived with a lot of mission brown in my old house - but you're right, it'll date just as badly. Not sure about the stripe though, depends what it is made of. The horizontal stripe of feature tiles is still kicking around after 30 odd years, they just do it out of less garish tiles these days.
I quite like brown and have painted this entire house beige but the dark brown splashbacks annoy me - you see them everywhere. We did our kitchen with a medium brown granite look benchtop (one of the ads that is running on tv lately has an identical kitchen colour scheme to ours) but WHITE splashbacks. At least you can easily get rid of paint, tiles are harder.
There's a few houses around here for sale that are 80s specials - horizontal bright floral feature row of tiles around the top of the (otherwise boring) kitchen splashback, same frilly feature tiles in the bathroom with a smattering of single floral feature tiles here and there in the wall. I just look at them and go oh, nice house, nice kitchen, nice price, OMG there's no way in hell I could live with that kitchen but its not a cheap enough house to warrant ripping out a perfectly good kitchen, neeeeeeeeext!
So where was I? Oh yeah, if in doubt, stick with white, maybe cream, little bit of beige, stay the hell away from strong colours and patterns. They date!