It's nice to see you here today. Thank you for the time you've given to share this wonderful suggestion here in the forum.
Being able to customize the design and display contrast of the Reconciliation page is indeed a great idea to have in QuickBooks Online. I've submitted feedback for this which is sent to the Development Team for review. QuickBooks is constantly evolving to keep pace with organizations as they grow, and to ensure that customers are working with the plan that’s the best fit for them.
The feedback provided by users drive the introduction and development of software. Please stay tuned to our product updates by visiting our QuickBooks Blog. Additionally, QBO is a cloud-based platform, and product releases are automatically rolled out to users once available.
As always, I'm here if you should have any questions or need anything. Hope you have a great weekend!