Quinoa is a seed, which is usually used as a gluten-free grain.  It comes in different colours, or a mix of colours (known as Andean mix).  The difference in the use and taste of the different colours is as follows:

White –soft texture, buttery taste; excellent base for sweet or savoury flavours; absorbs the flavour of  companion foods

Red – more texture than white; earthy, nutty aromas; good base for stuffings or salads; goes well with onion, garlic, vegetables, nuts

Black–  more texture again; earthy flavour; pairs well with vegetables and/or other quinoa varieties