HTML Opacity v/s Alpha

I am building a page that allows employees to search for public MS Teams groups — for some reason, Teams uses a ‘starts with’ search, and our staff rarely manages to find the public Teams that are out there. I wanted the list of teams and descriptions to have a visible line separation, and a table border looked bad with the enterprise color scheme. I decided to use even/odd table rows to display a slightly lighter background color. I set an opacity on the background so the actual background image is still visible.

My font colors changed! The opacity applied to the text as well.

tr:nth-child(even) {background-color: rgb(52,52,52); opacity: 0.5;}

Instead of setting an opacity on the row, I added an alpha channel to the row background color without impacting the text within table cells.

tr:nth-child(even) {background-color: rgba(52,52,52,0.5);}

 

 

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