Change it from beige to blue - and you'll have trouble reading the blue text... change it to red and you'll have trouble reading the red text...
Changing the background color will never work so long as folks use text colors that do not contrast well.
Well, it should not just be a new default background color but it should let players to change the journal scroll background color at their pleasing so as to match better contrast with the whatever text color they feel to use.
For example, say that I want to pick a very light color for text, on the current journal scroll background color, a light text might not contrast well and so be readable with difficulties.
If I had the ability to, say, "darken" the background color of the journal scroll, I could reach the end result that my text color of choice could be more readable on the journal.
That's the type of thing I was thinking about.