I am new to tiling, tiles are going on well but having grouted a wall for shower installation it's left me thinking I went too dark with the grout, will probably just have to live with it now. It's not so bad around the white tiles but not so good with the mosaics. Thoughts?
Like what Paul says. Grout Rescue if you can't live with the colour.
Is it a dark grey? and what was the time difference between grouting and taking the picture? The grout might still be drying out. You may find that the grout is lighter tomorrow.