Why not using CSS?

Example:

DECLARE @bodyMsg nvarchar(max)

DECLARE @subject nvarchar(max)

DECLARE @tableHTML nvarchar(max)

SET @subject = 'Query Results in HTML with CSS'

SET @tableHTML =

N'<style type="text/css">

#box-table

{

font-family: "Lucida Sans Unicode", "Lucida Grande", Sans-Serif;

font-size: 12px;

text-align: center;

border-collapse: collapse;

border-top: 7px solid #9baff1;

border-bottom: 7px solid #9baff1;

}

#box-table th

{

font-size: 13px;

font-weight: normal;

background: #b9c9fe;

border-right: 2px solid #9baff1;

border-left: 2px solid #9baff1;

border-bottom: 2px solid #9baff1;

color: #039;

}

#box-table td

{

border-right: 1px solid #aabcfe;

border-left: 1px solid #aabcfe;

border-bottom: 1px solid #aabcfe;

color: #669;

}

tr:nth-child(odd){ background-color:#eee; }

tr:nth-child(even){ background-color:#fff; }

</style>'+

N'<H3><font color="Red">All Rows From [AdventureWorks].[Sales].[SpecialOffer]</H3>' +

N'<table id="box-table" >' +

N'<tr><font color="Green"><th>SpecialOfferID</th>

<th>Description</th>

<th>Type</th>

<th>Category</th>

<th>StartDate</th>

<th>EndDate</th>

</tr>' +

CAST ( (

SELECT td = CAST([SpecialOfferID] AS VARCHAR(100)),'',

td = [Description],'',

td = [Type],'',

td = [Category] ,'',

td = CONVERT(VARCHAR(30),[StartDate],120) ,'',

td = CONVERT(VARCHAR(30),[EndDate],120)

FROM [AdventureWorks].[Sales].[SpecialOffer]

ORDER BY [SpecialOfferID]

FOR XML PATH('tr'), TYPE

) AS NVARCHAR(MAX) ) +

N'</table>'

EXEC msdb.dbo.sp_send_dbmail @recipients='AnyMailYouWant@SqlIsCool.com',

@subject = @subject,

@body = @tableHTML,

@body_format = 'HTML' ;

Result: