I have ugly grout in our kitchen. White tile with gray grout. I heard few options and want to get your help.

1) Regrout. I am not very handman, so I would like to pass this.

2) Color the grout. I tried that, but color is coming out. It was gurantted for 15 years, but came out in 2 months near sink area.

3) Color the ceramic tile including grout. This seems to be easier to do. Anybody has done this? How long the paint will last?

Thank you.