how should I go about dying these pants black? will the thread be dyed black as well if I use Rit? how can I protect the Carhartt patch from the dye?

Rit Dye Rit All Purpose Liquid Dye, 236ml, Purple, 8 Fl Oz

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What would happen if I covered my current hair with black Arctic Fox dye : r/HairDye

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Trying to make Chuchamaru's bag for my dog's costume. Should I try

LC. I think about buying these and dying them black. I've read

How do I shade dark clothes correctly so the shading won't blend