MyBB Community Forums

If you look at subforums that have new posts, their color is different from the subforms with posts you have already read. I mean, there is seperated class in .css to customize subforums without and with new posts.
Is there any way to make this for forums?
I have in plan to remove lightbulb effects and add custom icons but I still want my users to be able to see if there is new posts in forums.

There are dedicated classes forum_on and forum_off for lightbulbs. Not sure if they are what you're looking for, but seems the class names and can be used and custom styles can be written.

Any tips how can I start?

BUMP! I tried to add {$lightbulb['folder']} (It's ON if there is new posts and OFF otherwise) and customize my css to use 2 css classes, but it doesn't work at all. Any other ideas?

<a href="{$forum_url}" class="forum_baslik {$lightbulb['folder']}">{$forum['name']}</a>

in .css

.forum_baslik.on
{
   color: #ffffff;
}

.forum_baslik.off
{
   color: #a0a0a0;
}

Devs?