In our house, the kitchen had tile in it for some time. I’m not sure if the previous owner sealed the grout, but we thought it was supposed to be dark. Honestly, it just looked bad but I wasn’t about to regrout the whole thing. Instead, Jess brought home some grout paint. I’ll say it still wasn’t easy to do, but with about 15ish hours of painting we finally got the floor looking good. It’s pretty uncomfortable sitting on tile floor for that long, so sitting on a pillow or using a kneeling cushion is helpful.
After this grout project, we installed hardwood floors everywhere else downstairs and in the master bedroom and both bathrooms upstairs.