Hey there, bpe2000.
I appreciate you taking the time to visit the Community today. I'd be glad to provide some insight on your question about the contrast and appearance of your page.
There are many functions and options in QuickBooks Online, but at this time there isn't currently a way to adjust the contrast from within the system. I can see how having the option to customize the view of your home page would be a great addition. I'll be sure to pass your feedback along to the Product Development Team to be analyzed.
You can stay up to date on feature releases and product updates by visiting the QuickBooks blog: https://quickbooks.intuit.com/blog/.
I wish you and your business continued success. Please let me know if you have any other questions. Take care.