To know about using the html color value and name you can try these terms of use.
<html>
<body>
<p style="background-color:#87CEFA">
Color set by using hex value
</p>
<p style="background-color:rgb(135,206,250)">
Color set by using rgb value
</p>
<p style="background-color:lightSkyblue">
Color set by using color name
</p>
</body>
</html>
Save it as test_color_value&name.html
<html>
<body>
<p style="background-color:#87CEFA">
Color set by using hex value
</p>
<p style="background-color:rgb(135,206,250)">
Color set by using rgb value
</p>
<p style="background-color:lightSkyblue">
Color set by using color name
</p>
</body>
</html>
Save it as test_color_value&name.html