<p>When does a question icon switch from having a white background to having a green background? Some of the questions I have answered have white background icons and others have green, it seems that green is better than white. How is that determined? <a href="https://i.stack.imgur.com/GeqQm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GeqQm.png" alt="Icons are on the left"></a>.</p>

<p>This is not only when the answer is accepted. For example, from my home page
<a href="https://i.stack.imgur.com/mcXOL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mcXOL.png" alt="Left icon when answer accepted, what about on the right?"></a> </p>

<p>Note the two entries for <strong>On round robin $R^2$ values for three methods</strong>
On the left it has a green box with a one in it, on the right it has a grey box with a 5+ in it.</p>

<p>I am guessing that this latter, right sided grey, or "off white" converts to green when someone marks the question as a favorite, is that so? Maybe try it, and see?</p>
