message: schema: add default colors for foreground and background
  Added `#000000` as default for `background` and `#FFFFFF` as default for `foreground` in JSON schema.
  ## PR Checklist
  * [x] Closes
diff: },
  "background": {
  "$ref": "#/definitions/Color",
  - "description": "Sets the background color of the profile. Overrides background set in color scheme if colorscheme is set. Uses hex color format: \"#rrggbb\". Default \"#000000\" (black).",
  + "default": "#0c0c0c",
  + "description": "Sets the background color of the profile. Overrides background set in color scheme if colorscheme is set. Uses hex color format: \"#rrggbb\".",
  "type": ["string", "null"]
  },
  "backgroundImage": {
  },
  "foreground": {
  "$ref": "#/definitions/Color",
  - "description": "Sets the foreground color of the profile. Overrides foreground set in color scheme if colorscheme is set. Uses hex color format: \"#rrggbb\". Default \"#ffffff\" (white).",
  + "default": "#cccccc",
  + "description": "Sets the foreground color of the profile. Overrides foreground set in color scheme if colorscheme is set. Uses hex color format: \"#rrggbb\".",
  "type": ["string", "null"]
  },
  "guid": {
  