Redmine

Thank you for working on this. The advantage of the current tab style is that is is visually very clear which tab is selected due to the inverted background of the tab.

With just the colored underline, I have a harder time to detect the currently selected tab with a quick glance. While this style may look "more modern", I personally see it as a step back from a usability perspective, unfortunately.

The "contrast" between the active tab and the inactive tabs could possible be increase by "dimming" the non-active tabs, e.g. by setting their text size to a light grey or generally by highlighting the active tab with color. However, again I fear that this will reduce the visible contrast and thus usability overall.

In general, I'm not a huge fan of the current trend of subtle and reduced indicators in "modern" UIs as they tend to have poor usability, both for able people but even more so for visually impaired users. In fact, I believe that the tabs and its general style we have right now in Redmine is one of the strong points of Redmine's UI as it strongly structures the projects and settings pages. Also, I believe the concept of tabs is well established and is known and understood by most users and is sufficiently "cross-platform" to work for users across most current platforms and UI paradigms.

Thank you for your comment. I will look for another approach to improve the appearance.