There is quite a bit of customization available in the Halo Master Chief Collection. Using the games Battle-pass system, you can unlock new armor items and equip them onto your Spartan. Then, change the colors to make yourself more unique.
This guide is suitable for the Halo Master Chief Collection, which includes Halo Reach, Halo Combat Evolved, Halo 2, Halo 3, Halo 3: ODST and Halo 4. For more Halo MCC Guides, make sure to check out our dedicated area here!
Changing Armor
Head to the main menu/home screen in Halo MCC and choose ‘Options & Career’ on the left hand side. In the next window, select ‘Customization’.

Here, you can find appearance options for your Spartan. You can switch out your Helmets, Shoulders, Chest, Wrist, Utility Items, Visor Colors, Knee Guards and Armor Effects. Just select the object you want to change to see available options.
How to Unlock New Armor
If you’re still relatively new to the game, you likely won’t have new armor options to choose from. That’s because you’ll need to unlock them through Season Rewards, which is a Battle-pass like system.

Season Rewards cost Season Points, and you can earn Season Points simply by levelling up. One win will give you one point, which you can come and spend here on Tiers. As you can see by the screenshot above, unlocking the first tier will give you 3 new helmets alone.
If you don’t know where to find the Season Rewards screen, go to the main menu and choose ‘Options & Career’. Select the first option in the next screen, which is Season Rewards.
Changing Armor Color
Finally, after designing your Spartan, you can start taking a look at colors. You can find the colors menu in the same screen where you choose your armor, just select the ‘Colors’ tab at the top of the screen.

You are able to choose a primary and secondary colors, with each of them changing the look of each armor item.