Read the color styling of every tile on an xTiles page (view) by viewId: each tile with its title, color (palette background color) and color_size (color variant / border style). Both are null when the tile has no palette color. Use this to inspect current colors before recoloring with xtiles_set_tile_styles. It is also where the palette of an existing page is read before adding tiles to it, so the new tiles continue those colours — see xtiles://guide/markdown/design.