Hello, Sherri here.
This is something new for me (only did it yesterday)
Therefore, I'm not sure if you can emboss it if the font isn't white etc.)

App needed:
Phonto

1) enter Phonto and select your picture
2) add your text and make it less opaque

3) go to 'shadow' and choose the shadow option in the orange circle. For the colours, choose the ones in the blue circle (except white/ your font colour)

4) adjust 'x' , 'y' and 'alpha'
Tip: it is different for each font & word

5) results:

~fin~
Thanks for reading!

Do comment if you have any new ideas/findings about this?