intuit will not do that
best you can do is vary the contrast and brightness of the monitor.
some time back I saw a screen you put over the monitor to help with vision problems, can not remember what it was called or what vision problems it was supposed to help with
Making the fonts darker is good service for the community using the product.....It gets harder to read as we get older.....INTUIT......PLEASE FIX THIS!
I agree with having an option to adjust the font in QBO, ljhm.
Just like you, I also have vision issues and that's why I understand how you feel. You can consider @Rustler's suggestion to adjust the contrast of your monitor. I'd also like to share a trick that has worked for me.
You can adjust the font size of your browser to make the letters bigger and in bold. This way, you won't find it hard to read the letters on the screen. Please note though that this will affect all of the open programs in your browser.
I use Google Chrome all the time, so you can follow these steps to customize the font:
If you use a different browser, you can search online for the steps.
I've also added screenshots.
You can always leave a reply if you have more questions. Thanks for sharing your feedback and have a good day.