I know, it’s an extremely stupid issue!
Here is the solution:
Just go to /usr/share/themes/Adwaita/gtk-3.0/ and add the following text to the file named gtk.css:
.nemo-desktop.nemo-canvas-item {
color: #FFFFFF;
text-shadow: 1px 1px @desktop_item_text_shadow;
}
.nemo-desktop.nemo-canvas-item:selected {
background-color: alpha(#D64A38, 0.9);
background-image: none;
color: #FFFFFF;
text-shadow: none;
}
You can replace Adwaita with whatever theme you’re using and the color codes to whichever colors you choose (#FFFFFF is for white, which is perfect for me)
Credit goes to herunotenchi on https://github.com/linuxmint/Cinnamon/issues/3226
Just Some Techie Notes! 
Thanks for share the solution. But if you open a not maximized window, the color of the Font change again to grey… In all themes. Exist any solution with always White text for the nemo desktop? Thanks again.
LikeLike
Open a terminal window and past this in it.
Logoff then login.
echo “.nemo-desktop.nemo-canvas-item {
color: #FFFFFF;
text-shadow: 1px 1px @desktop_item_text_shadow;
}”>~/.config/gtk-3.0/gtk-1.css
LikeLike
Opps it should be:
echo “.nemo-desktop.nemo-canvas-item {
color: #FFFFFF;
text-shadow: 1px 1px @desktop_item_text_shadow;
}”>~/.config/gtk-3.0/gtk.css
LikeLike
worked like a charm; thank you
LikeLike
I copy pasted :
echo “.nemo-desktop.nemo-canvas-item {color: #000000;text-shadow: 1px 1px @desktop_item_text_shadow;}”>~/.config/gtk-3.0/gtk.css
That did the trick, thank you.
LikeLike
I try to modify the file as you say, but can’t because I get a message saying that it is protected…
LikeLike
Try typing sudo before the command.
LikeLike
Thank you!, The solution of Pturke worked for me.
LikeLike
Hello SoCRaT!
I wondered if it’s possible to use this code to (instead of changing the font color) increase the text-shadow of my desktop-fonts? The shadow behind the letters are so small that i have a hard time reading what they say unless i have a really dark background. I’m a bit of a newbie in using Linux, so i’m far from a coder!
LikeLike