XML : xsl:when condition doesn't work

I'm attempting to create an xsl:choose statement with conditions like that: I have movies and a lot of different genres. Every genre should have different color. For example comedy should be red, drama should be blue and so on... But i think the condition is wrong because it's not working.

       <xsl:choose>          <xsl:when test="genre = Comedy">              <td color="red"><xsl:value-of select="genre"/></td>       </xsl:when>       <xsl:when test="genre = drama">              <td color="blue"><xsl:value-of select="genre"/></td>       </xsl:when>  ......