Hello! I am using this theme as well and faced the same problem as you did. You will need to edit the style.css file directly to change the default colour. The steps are as follows;
Step 1
Scroll to the bottom of the stylesheet and add the following lines of code. This is to add the styles for the pink scheme.
/* Pink */
.pink #nav a:hover, .pink #nav .current_page_item a{
background: url(images/navbtnhover.jpg) repeat-x 0 50%;
}
.pink #headerimg h1 a, .pink #wd *, .pink .more-link{
color:#BD1785
}
.pink .post h2 a, .pink .post h3 a, .pink .post h2, .pink .post h3 {
color:#BD1785
}
Step 2
Ctrl+F and search for the term "navbtnhover.png". It should be at line #139. Change this to your desired default.
Example:
Change this line,
background: url(images/navbtnhover.jpg) repeat right center;
to this,
background: url(images/navbtnhover_orange.jpg) repeat right center;
Step 3
Ctrl+F and search for the color "#BD1785". Replace the first two with the color of your default font. They should be found on lines #56 and #158.
Example:
Change this line,
color: #BD1785;
to this,
color: #E57F1D;
Hope this helps!