There are places to get lists of HTML or X11 colour names and their RGB equivalents. For instance we can find that "Aquamarine" is "#70DB93". Presumably the browsers know the mappings. Is there a way to use javascript to interrogate the browser and get a list of which colour names it supports (along with the RGB the browser plans on using)?
These are meta to Javascript (they're used in CSS, amongst other things), and as a result I doubt they're queryable in that form.
Here's a list of the ones all browsers should know: CSS Color Names
From that page:
The W3C HTML and CSS standards have listed only 16 valid color names:
aqua, black, blue, fuchsia, gray, green, lime, maroon, navy, olive,
purple, red, silver, teal, white, and yellow.
EDIT: Since you asked, I checked if this is doable with Safari at least. I was able to do this (I threw this together in minutes, bear with it):
<html>
<head>
<title>Color Test</title>
<script type="text/javascript">
function $(id) { return document.getElementById(id); }
function do_chocolate() {
$("foo").style.color = "chocolate";
alert($("foo").style.color);
}
</script>
</head>
<body>
<div id="foo">
This should change when you click below
</div>
<a href="#" onclick="do_chocolate();">Click me</a>
</body>
Safari shows me this alert when I click:
rgb(210, 105, 30)
I'm not familiar enough with Javascript to probe that color, but it looks like it can be done. If I were in a hurry on this project, I'd just stringize the color (like Safari did to display that alert to me) and grab each part. Since this is Javascript/DOM, however, I know there's a way to get in there and get each color component, but I don't know what it is. At least I've set you down the path, no?