This will darken the overall color off the travertine tile but the natural look of the holes will remain and the holes will be filled.
Travertine tile grout color.
It s a stone that gives your kitchen or bathroom backsplash floor or bath shower walls or surrounds an ancient roman look.
If a matching grout is used it just won t look like travertine.
This stone is suitable for floor and wall applications and can be used as an accent or to cover entire spaces.
Other than the meek color it s not for the design faint of heart.
Travertine is more about texture than it is about wild coloration.
The color travertine you used is a pretty common color.
It is advisable to seal travertine tile prior to grouting when using a darker colored grout.
If you re wanting to contrast and go darker as patrick has suggested i would use 59 saddle brown.
Grout in a darker color can be chosen to fill the holes and lines for contrast.
Travertine has a pitted mottled texture layering and an even light beige color.
Unfortunately in this case it sounds like the darker grout did absorb into the travertine tiles and stained the travertine.
There are many shades of brown available in travertine.
Iranian travertine offers light golden brown and cool light mocha brown.
Both warm and cool and light and dark shades are found.
Noce is a travertine with a delightful caramel brown color.