Yes, be very careful. I’m assuming this is a home hair-color kit? They often come out much darker at first. If it’s semi-permanent, I’d recommend washing your hair with your regular shampoo, but use a whole bunch, so your hair is all coated. Leave the shampoo in for maybe 10 minutes, with your hair wrapped up in a towel. Try this a couple times.
Whatever you do, do NOT try to recolor it. It’s not like your hair is just natural black and waiting for some lightening. You still have chemical dye in your hair. I learned this the hard way and turned my hair green. Literally green, like this guy ->:rolleyes:
Be VERY nice to your hair afterwards. Get some good conditioner. Don’t blowdry or heat style any more than is absolutely necessary. AFAIK, the olive oil and mayo will condition your hair very nicely, but I’m not sure they will do much to change the color.
Good luck. I’m another who God chose not to bless with a pretty haircolor or the money to change it professionally. I’m currently waiting for a bright yellow streak to grow out.