How do I change the color of my post title?

I installed a theme on my wordpress blog names ''precision''.
The default color of the post title is black. I want to change the color.
How do I go about?
I have no technical knowledge and can only follow your directions when it comes to coding.
http://visioncareforeveryone.com is my blog address. Please check it and help me out.

 

In the template file "style.css" (Appearance → Editor) is the following code:

The #123456 value represents a specific color. You can find others here: http://www.computerhope.com/htmcolor.htm

You can change the black color by replacing "#000" with something else.

 

Thanks Devdart
Really appreciate it !