Modern Dark theme

1: Is it possible to Change text color inside the upload box too black? "drop a file here or click to upload"

Changing field color works but I cannot change the field color to black because when the user types in there information on the other fields it is also black and cannot be seen.

2 Is it also possible to change the maximum upload size text to black or remove it?

As you can see in the screen shot its very hard to see.

Thank you.