S63 + S633 + S643
21 designs by sef
All designs by SEF (alien polymath)
Be aware that colours vary between different fabrics *and* display devices. Check via test swatch if you need an exact match to something. Go off-site for better indexing into the designs on here.
Semi-regular grids/lattices based on the hexagon with equilateral triangles and, sometimes, squares (ie 6363, 63333, 6434).