文本「Hello, world.」显示的颜色是?
<style> #content .text {text-color:red;} #content>.title {color:green;} #content div.title {font-color:blue;} strong {font-color:yellow;} * {color:black;} </style> <div id="content"> <span class="text"><strong class="title">Hello, world.</strong></span> </div>