Fix up bbcode latex rendering

classes/text.class.php

@@ -749,7 +749,7 @@ class Text {
           $Str .= '<a href="wiki.php?action=article&amp;name='.urlencode($Block['Val']).'">'.$Block['Val'].'</a>';
           break;
         case 'tex':
-          $Str .= '<img style="vertical-align: middle;" src="'.STATIC_SERVER.'blank.gif" onload="if (this.src.substr(this.src.length - 9, this.src.length) == \'blank.gif\') { this.src = \''.ImageTools::process('https://chart.googleapis.com/chart?cht=tx&amp;chf=bg,s,FFFFFF00&amp;chl='.urlencode(mb_convert_encoding($Block['Val'], 'UTF-8', 'HTML-ENTITIES')).'&amp;chco=').'\' + hexify(getComputedStyle(this.parentNode, null).color) + \'.png\'; }" alt="'.$Block['Val'].'" />';
+          $Str .= '<img class="tex_img" style="vertical-align: middle;" src="'.STATIC_SERVER.'blank.gif" onload="if (this.src.substr(this.src.length - 9, this.src.length) == \'blank.gif\') { this.src = \''.ImageTools::process('https://chart.googleapis.com/chart?cht=tx&chf=bg,s,FFFFFF00&chl='.urlencode(mb_convert_encoding($Block['Val'], 'UTF-8', 'HTML-ENTITIES'))).'\'; }" alt="'.$Block['Val'].'" />';
           break;
         case 'plain':
           $Str .= $Block['Val'];

static/styles/beluga/style.css

@@ -2065,6 +2065,10 @@ tbody .staff_post {
 	color: #e896e8 !important;
 }
 
+.tex_img {
+  filter: invert(100%);
+}
+
 /* Pink Additions */
 
 body.style_pink .cats_anime:after { color: #78467f; }