[addamroy]

Find the forumhome_lastpostby template via edit templates > Forum Home Templates.

Find the code below

<a href="{vb:link thread, {vb:raw threadinfo}, {vb:raw pageinfo_lastpost}}#post{vb:raw lastpostinfo.lastpostid}"><img src="{vb:stylevar imgdir_button}/lastpost-{vb:stylevar right}.png" alt="{vb:rawphrase go_to_last_post}" /></a>

Before it add

<vb:if condition="$forum[forumid] == XXX">
<font color="#XXXXXX">
</vb:if>

After it add

<vb:if condition="$forum[forumid] == XXX">
</font>
</vb:if>

Replace both instances of XXX with the forumid of the forum you want to change the thread title color of.

Replace XXXXXX with the hex code for the color you want the thread title colors to be.

I created an additional mod anyway, in case anyone else has the same question.

https://vborg.vbsupport.ru/showthread.php?t=293431