Black it is then.
Watches
A community for watch & horology discussion.
You do not need to be wearing blue clothes to wear a blue watch! In fact, when you're wearing blue is a good time to be wary of wearing a blue watch, since not all shades of blue go together, and it could look matchy matchy even if they do. Black is a solid choice if you're not into worrying about what goes with what.
It reads like you know what to do. Always bet on black.
(I may get skewered for this, but it’s just an opinion of one.). Personally, I am a lot more “OCD” about matching strap color with attire.
I don’t think the dial color matters much except in the most formal of circumstances. I see watch dials as an inconspicuous place to have a bit of fun with color/design that may or may not strictly match or compliment the attire color(s), sort of in the same vein as pairing a “loud” necktie or socks pattern with an otherwise staid and conservative suit. I mean, no one bats an eye at wearing a flaming orange Doxa with a “business casual” outfit! (Besides, where does that leave stuff like Mr. Jones - those dials don’t really match anything, lol.)
If you want the most absolute “neutral” dial color possible, I think white is probably more versatile than black (paired with brown, black, blue, etc. strap as appropriate).