I know I am a huge minority here, but I’ve been using teal ever since I started playing halo. It was in the game at launch, but I was really disappointed to find out it was removed. I thought it may be re-added in future updates, but I’m losing hope. I know there wasn’t many people who used teal, but it would be pretty swell if it was added back again. 
Use “Celeste”. And before you say it’s not correct, I’m going to show you two screenshots of a specific Spartan get-up I like to use. One of these is from before Teal was removed, and the other uses Celeste. See if you can tell me which is which:
Now, clearly they’re not identical … and that’s the problem, but it’ll do in a pinch (they are VERY close). But I highly doubt they’re going to update the color pallet a second time.
> 2533274883669557;2:
> Use “Celeste”. And before you say it’s not correct, I’m going to show you two screenshots of a specific Spartan get-up I like to use. One of these is from before Teal was removed, and the other uses Celeste. See if you can me which is which:
>
> Exhibit A.
>
> Exhibit B.
Redacted
I was a Teal user myself before the color update, Celeste does the trick for me 
> 2533274813317074;4:
> I was a Teal user myself before the color update, Celeste does the trick for me
But you didn’t guess which was which in the post above 
> 2533274883669557;5:
> > 2533274813317074;4:
> > I was a Teal user myself before the color update, Celeste does the trick for me
>
>
> But you didn’t guess which was which in the post above
Oops, well I’m going to guess that the 1st one is Celeste
Agreed, all of the green/blue tones were removed so they could add “more” colors.
When I logged in my teal Spartan was Pink. :\
I, too, was a teal user before the color palette was updated. Now I’ve moved onto azure, as I’ve found it to be appealing in a different sort of way.