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If you include an inline RGB decimal value, Lotus Notes 8.0 will ignore the entire style declaration.

For example:

<td style="font-size:10px; color:rgb(125, 125, 125); font-family:Arial; padding:20px; background-color:#F90"> 
  	This is a TD test
 </td>

Will get converted to this:

<td>
 	This is a TD test
 </td>

What’s the fix?

Simply use hexadecimal values instead:

<td style="font-size:10px; color:#7d7d7d; font-family:Arial; padding:20px; background-color:#F90"> 
 	This is a TD test
 </td>

RGB decimal values are supported in embedded styles so another possible fix is to use embedded styles but this won’t work in Gmail.

For example:

<style type="text/css">
 .rgb_color {
    font-size:10px;
    color:rgb(125, 125, 125);
    font-family:Arial;
  }
</style>

I tested this using the color and background CSS properties within several various HTML tags. This is particularly important if you use WYSIWIG editors when developing HTML emails.