I only want black letters on a white background

In the preference file, what do I add to get black letters on a white background. My eyes are old and I cannot easily read the standard colors.

Editing preferences.txt will not help, lib/theme/theme.txt is the right place.

Here is the relevant part:

console.font = Monospaced,plain,11
console.font.macosx = Monaco,plain,10
console.color = #000000
console.output.color = #eeeeee
console.error.color = #E34C00