Question CSS file not found

Am back again having really spent a lot of time on this. I'm trying to edit the color of the blue backgrounds of the Forum Titles. The template is the default and I have edited every instance of the hex code #5388B4 (Which is the code for the blue color) in all the css files in the components/com_kunena/template/default/css folder but the color does not change. The source code of my Kunena index page shows all the components with the blue color so I assume ther must be another css file hat I haven't found. Firefox with Firebug does not reveal another css file. I have clearly missed something here but cannot see what. The class i am looking for seems to be something like ".kblock"
Any guidance would be very welcome.
Thank You
The attached screenshot shows the bars I mean

*** Topic moved ***

At the risk of sounding like a recording repeating the same advice, let me make it simple (I refer, by the way, to the FAQs page where it talks about how to change the colours (or any other CSS style attributes) in Kunena).

(1) For all those people who want to change the original source files in Kunena: don't! ... not unless you know exactly what you are doing and how things work. If you don't know how Kunena works then leave it alone. If you've made wholesale changes to the original Kunena source code, then re-install Kunena and all of those changes will revert back to their original forms. The one constant, the one thing that does not change if you re-install Kunena, is that you will not lose the messages that users wrote, the topics, categories or the database that underpins the whole forum.

(2) If you want to make really simple changes (e.g. changing the blue backgrounds of the category headings) then, if you use the Blue Eagle template there are settings to do some of these things. Use the Kunena Template Manager.

(3) If you must make other simple changes, to adapt Kunena more in line with the general theme of your site, then change your Joomla site template CSS. Add specific rules for #kunena to the end of your Joomla site template CSS file. If you look at any one of the topics in this Template and Design category where I have been involved in answering questions like how to change CSS, you will see that in 99.99% of those cases - I have no recollection over the past 2 years where I have written something different - you should change your Joomla site template CSS file.

In addressing the topic subject "CSS file not found":

• if the file that you're looking for is a Kunena file then re-install Kunena to put it back where it's supposed to be.
• If your question is which file should you be trying to change, the answer is to read the advice in the FAQs page (there's a menu item near the top of this page). I actually feel this is what the topic is about and why I moved it to the Template and Design category.

I hope this helps.

I would definitely not try to edit the source code of Kurena. I hope I have enough knowledge to know when not to interfere with things that I don't fully understand. You have in fact answered my query perfectly. All I wanted to do was to change the blue backgrounds of the category headings and as you say this is very easy to do in the Template Manager Parameters. Mission accomplished, thank you