SC3 isosceles : contest
72 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.
Obtuse isosceles triangles (based on the semi-regular grid of dodecagons and equilateral triangles) in Spoonflower contest palettes.