Text color VTi Image

you must find skin.xml file in your box , it must be in
usr\share\enigma2\ , download skin.xml file in to your pc and open with some xml editor .... you can use ultraedit that I recomended , or dreamweaver , homesite , notepad ++ and others ......

Do not be afraid when you see how big is code ... you must find a lines subtitles
it must be something like this code

<subtitles>
<sub font="Regular;30" name="Subtitle_TTX" shadowColor="#30101010" shadowOffset="2,2" />
<sub font="Regular;30" foregroundColor="undcdcdc" name="Subtitle_Regular" shadowColor="#30101010" shadowOffset="2,2" />
<sub font="Regular;30" foregroundColor="selectedFG" name="Subtitle_Bold" shadowColor="#30101010" shadowOffset="2,2" />
<sub font="Crs;30" foregroundColor="undcaaaa" name="Subtitle_Italic" shadowColor="#30101010" shadowOffset="2,2" />
</subtitles>

now you can edit this line for change colour foregroundColor="undcaaaa" ( change bold )

If you find line like this foregroundColor="selectedFG"
than you must open skin.xml file again and find this lines

<colors>
<color name="background" value="#16101214" />
<color name="black" value="#00040404" />
<color name="blue" value="#00879ce1" />
<color name="bluetransparent" value="#08001e4b" />
<color name="dark" value="#00242424" />
<color name="darkgrey" value="#00555556" />
<color name="foreground" value="#00f0f0f0" />
<color name="green" value="#0056c856" />
<color name="greentransparent" value="#08004c00" />
<color name="grey" value="#00aaaaaa" />
<color name="listbox" value="#000f56a4" />
<color name="noTransBG" value="#00101214" />
<color name="orange" value="#00ffc000" />
<color name="rds_text_bg" value="#00003258" />
<color name="red" value="#00ff4a3c" />
<color name="redtransparent" value="#084c0000" />
<color name="rssviewtop" value="#00005050" />
<color name="secondBG" value="#16101214" />
<color name="secondFG" value="#00fcc000" />
<color name="selectedBG" value="#06303240" />
<color name="selectedFG" value="#00fcc000" />
</colors>

now on bold line simple change the value
example:
<color name="selectedFG" value="#46b294e4" />

good luck