Hi Mzenker,
I was able to blend the colour gray back into my Mum in-laws bleached carpet by using a gray fabric dye. It worked out fine. If you can’t find charcoal colour, some black dyes can be diluted down do get a matching gray. When you read the instructions check to see if that brand suggests you can do that, if not find a different brand.
Be careful when using fabric dye because it is very concentrated and you can end up with a big mess. Before you start find a scrap piece carpet to practice on to get the matching tone of gray. Hope this helps you out.
Regards from Noelene
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