The patterns Excel offers in Format Cells → Fill → Pattern Style, in Excel's own grid order (left
to right, top to bottom, six to a row): solid and the grays darkest first, then the dark
stripes, then the thin ones.
Remarks
Solid leads, as in Excel: a tile that is all background color (see toPatternSlots).
None is omitted — it is a fill type in this model, not a tile. Custom is omitted because
there is nothing to draw until custom tiles land.
The patterns Excel offers in Format Cells → Fill → Pattern Style, in Excel's own grid order (left to right, top to bottom, six to a row): solid and the grays darkest first, then the dark stripes, then the thin ones.