Examine source code of BM Minimalist Red

{
  "theme": {
    "images": {
      "theme_frame": "header-red.png"
    },
    "colors": {
      "frame": "#f2e4e4",
      "tab_background_text": "#3f0a0a"
    }
  },
  "version": "2.0",
  "name": "BM Minimalist Red",
  "manifest_version": 2,
  "description": "I decided to make a recolor of the original theme (BM Minimalist Redo). This time, it's a red version."
}