It sounds like you want to use a transparent background, in which case you could try using the rgba() function: rgba(R, G, B, A). ... <看更多>

CSS Background Opacity ... So we can make a box where its contents are transparent but the borders / text ... ... <看更多>

... and looking for the action bar with opacity background only but not child element. ... app.css. Page{ background-color:"green"; } ... ... <看更多>

Just read this article. It explains everything: https://css-tricks.com/rgba-browser-support/. You should have: div { background: rgba(0, 0, 0, 0.5); color: ... ... <看更多>

The only thing we ask is that you not re-sell the icons themselves. ... at 100% opacity when displaying these on light or dark backgrounds, respectively. ... <看更多>