Examine source code of Material Gruvbox Theme

{
  "name": "Gruvbox Theme",
  "theme": {
    "colors": {
      "gruvbox_bg_dark": [
        29,
        32,
        33
      ],
      "gruvbox_bg_standard": [
        60,
        56,
        55
      ],
      "gruvbox_bg_light": [
        80,
        76,
        75
      ],
      "icons_attention": [
        234,
        105,
        98
      ],
      "bookmark_text": [
        251,
        241,
        201
      ],
      "button_icon": [
        234,
        105,
        98
      ],
      "frame": [
        29,
        32,
        33
      ],
      "frame_inactive": [
        29,
        32,
        33
      ],
      "frame_incognito": [
        251,
        241,
        201
      ],
      "frame_incognito_inactive": [
        251,
        241,
        201
      ],
      "tab_background_text": [
        251,
        241,
        201
      ],
      "tab_text": [
        251,
        241,
        201
      ],
      "tab_line": [
        125,
        174,
        163
      ],
      "tab_loading": [
        125,
        174,
        163
      ],
      "tab_selected": [
        80,
        76,
        75
      ],
      "toolbar": [
        60,
        56,
        55
      ],
      "toolbar_text": [
        251,
        241,
        201
      ],
      "toolbar_icon": [
        125,
        174,
        163
      ],
      "toolbar_field": [
        29,
        32,
        33
      ],
      "toolbar_field_text": [
        251,
        241,
        201
      ],
      "toolbar_button_icon": [
        125,
        174,
        163
      ],
      "toolbar_field_border_focus": [
        234,
        105,
        98
      ],
      "toolbar_field_highlight": [
        234,
        105,
        98
      ],
      "toolbar_top_separator": [
        251,
        241,
        201
      ],
      "popup": [
        29,
        32,
        33
      ],
      "popup_text": [
        251,
        241,
        201
      ],
      "popup_border": [
        125,
        174,
        163
      ],
      "popup_highlight": [
        95,
        174,
        133
      ],
      "popup_highlight_text": [
        251,
        241,
        201
      ],
      "ntp_text": [
        251,
        241,
        201
      ],
      "ntp_card_background": [
        60,
        56,
        55
      ],
      "ntp_background": [
        29,
        32,
        33
      ],
      "sidebar": [
        29,
        32,
        33
      ],
      "sidebar_highlight": [
        95,
        174,
        133
      ],
      "sidebar_text": [
        251,
        241,
        201
      ]
    }
  },
  "version": "1.5",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{099c6511-ce99-4245-9912-08cc23f805d9}"
    }
  }
}