How do I do this?

I am trying to make a script so It gets the LocalPlayer and if their on the Team with the Navy Blue color then something happens. Anybody know how to do this?

You've asked some very similar questions in the past, and I'd like to hope that you can use your brain. I don't believe you were looking for a simple if statement, given that you're posting this again.

local Player = game.Players.LocalPlayer
Player.Changed:connect(function(p)
if p == 'TeamColor' and Player.TeamColor == BrickColor.new'Navy blue' then
-- Your team. Player just got switched.
end
end)

That'll run your code as soon as the Player is switched to Navy blue team

if game.Players.LocalPlayer.TeamColor == BrickColor.new("Navy blue") then
	something happens
end

This must be in a localscript