If you can see THIS text in white, but NOT the table text below, then there's a browser override issue.
| Column 1 | Column 2 | Column 3 |
|---|---|---|
| Test 1 | This should be WHITE text | On dark blue background |
| Test 2 | All text should be visible | Not blue on blue |
If you CANNOT see the table text above in white, your browser is overriding CSS colors. Check browser accessibility settings.