Examine source code of color-test 35

{
  "theme": {
    "images": {
      "theme_frame": "specialone.png"
    },
    "colors": {
      "frame": "#1b0336",
      "tab_background_text": "#e8dcfa"
    }
  },
  "version": "2.0",
  "name": "color-test 35",
  "manifest_version": 2,
  "description": "gradient degrade colors couleurs solide grey gris-bleu bleu mauve purple"
}