How can I change text color for ONLY one heading?

Store Design
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2

Hi, @lflounge

Change your code and try again

"heading_Nc4eM4": {
  "type": "heading",
  "settings": {
    "heading": "CRITICAL: YOU MUST COMPLETE ALL STEPS IN YOUR ORDER CONFIRMATION EMAIL FOR ACCESS TO VIP PERKS! CHECK YOUR SPAM FOLDER IF YOU DO NOT SEE THAT EMAIL.",
    "heading_size": "h2",
  }
}

Hopefully it will help you. If yes then Please don’t forget hit Like and Mark it as solution!