How can I paint grout so that it looks new?

You can paint grout with acrylic paint, like from a hobby store or you can stain it with a grout stain. I've stained bathroom grout. Get a small paint brush, take your time and you should be fine. It can be time consuming, but it is really easy. Just make sure that you seal it after you've colored it.

Hi Ann Marie, Rather than painting the grout, you could just scrub it. I have used a product called Oxi Clean Max Force on my grout and it worked very well. Made my grout look brand new. Do a test sample first and then scrub it into your grout using an old toothbrush. Let it set 15 - 20 minutes. Then wipe clean with a clean damp cloth. I liked this product a lot and I am recommending it for you. Good luck with this project.

They make grout paint pens..... https://www.amazon.com/s/ref=nb_sb_ss_i_1_16?url=search-alias%3Daps&field-keywords=grout+paint+pens&sprefix=grout+paint+pens%2Caps%2C411&crid=292HPIYJ4G22L

Use the grout pens....real easy, made to do the job..ie skinny enough to color the grout, and not the tile. House no. 2 had may be ten tiles at the front door..ya to freshen up the place I got to paint the grout. Worked much better than a small brush.if you have it a garden kneeler pad or hockey style knee pads..use’ em.

http://www.thefrugalgirl.com/2013/07/you-guys-tile-grout-paint-amazing/