How do you dye socks black using household ingredients/equipment?

They are kinda thick. dont ask why, i just want them to be black.
Answers:
Go to lincraft, buy some black dye, follow the instructions, ta-da! your socks are dyed

but, i dont think you can dye your socks with singular houshold stuff, unless you get food colouring that is black, but who have black food colouring?
rit dye

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