This colour came out to be a very rich, 'forest green' colour. I dyed a large double duvet cover and used two packets of dye to make sure that the colour was really rich and vivid. It's a really simple process; took an afternoon to do.
I've used Dylon products quite a bit to get the colours I want, so am familiar with them. You do need to follow the instructions carefully; make sure you use the right amount of salt, and if dyeing large items you may need to make use two dye packets (only one helping of salt needed, even if you use more than one pack of dye). You also need to make sure there's plenty of room in the washing machine for the material to move around freely; if it clumps together than that will cause 'tie-dye' type effects.
You do NOT need to use Dylon's own salt; just any old table salt will do the job just fine.
Have found Dylon to be really useful for getting the right shade of bed linen or bath towels, which often are sold in creams and whites and not quite my kinda colours. It's also useful for covering up long-term stains or very faded areas on favourite clothes. Transforms tired underwear, too!
Worth noting: Dylon only works on natural fibres, so if you have polyester thread then it will stay the original colour! On my duvet cover, it did use poly threads on some seams, so the ystayed the original cream colour. Actually, looks quite nice.
Also, home dyed products do fade quite badly in strong sunlight. So it is worth using extra dye to get a very rich colour, or dry items out of sunlight, or be prepared for them to fade. A sofa cover which I did a couple of year ago, and which lives in a conservatory in direct sunlight, has faded to extremes... be warned!
Within those parameters, this is an excellent product, and one I'll happily use again.