Update 1.2 brings with it the ability to “unify your colors.” This option allows the rest of your armor pieces to be same color as your chest piece. Please note that this option does not currently unify your head piece color. That will be implemented in a future update.
To activate the unify colors option, open your character screen. To the right of your boots, there should be an armor icon. If you click that icon, “unify colors” will be turned on.
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