Examine source code of Blue thème

{
  "name": "logo-programambcan",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "canvas.png"
    },
    "colors": {
      "frame": "rgba(0, 77, 255, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(43, 61, 173, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(0, 196, 255, 1)",
      "toolbar_field_text": "rgba(15, 15, 15, 1)",
      "tab_line": "rgba(82, 82, 82, 1)"
    }
  }
}