Laser is a popular and inexpensive method, this means that you burn in the text or monogram with the help of a laser.
This means that you don't have no choice of color, the color depends on the base of the material.
In the right edge of the linen samples on this link you will see examples of what it might look like.
On the white book that is artificial leather, the laser turns a little yellow / brown depending on the base of the material and the heat from the laser.
The gray book is with Nubuk and there the results will be completely different see more examples via this link.