How To: Transparency header color options, when logo is text

Hello,

I am building a site that uses text for the logo position via:

add_filter('avf_logo_final_output', 'avf_text_logo_final_output');
function avf_text_logo_final_output($logo) {
	$link 	  = apply_filters('avf_logo_link', home_url('/'));
	$logotext = "My Logo Text Here";
	$subtext  = "";
	$subtext  = "<span class='subtext'>$subtext</span>";
    $logo     = "<h1 class='logo bg-logo'><a href='".$link."'>".$logotext."$subtext</a></h1>";

I want to change the color style of the logo text when using the transparent header option. Currently it displays as the default color.