If you are deliberately displaying it for the end user, wrap the JSON text in <PRE> and <CODE> tags, e.g.:
<html>
<body>
<pre>
<code>
[
{
color: "red",
value: "#f00"
},
{
color: "green",
value: "#0f0"
},
{
color: "blue",
value: "#00f"
},
{
color: "cyan",
value: "#0ff"
},
{
color: "magenta",
value: "#f0f"
},
{
color: "yellow",
value: "#ff0"
},
{
color: "black",
value: "#000"
}
]
</code>
</pre>
</body>
</html>
Otherwise I would use JSON Viewer.
