fix color contrast yellow highlight

Author: pancakereport

assets/custom-error-colors.css

@@ -1,34 +1,42 @@
 /*
- * Fix WCAG color contrast issues for ANSI colors in Quarto error outputs.
+ * Fix WCAG color contrast issues for ANSI colors in Quarto cell error outputs.
  * These colors are high-contrast replacements for default ANSI light-colors.
  */
 
 .cell-output-error .ansi-red-fg,
 .cell-output-error .ansi-bright-red-fg {
   /* Replace light red/bright red with a darker, accessible red */
-  color: #B30000; /* Example: Dark Crimson */
+  color: #B30000;
 }
 
 .cell-output-error .ansi-green-fg,
 .cell-output-error .ansi-bright-green-fg {
   /* Replace light green/bright green with a darker, accessible green */
-  color: #006600; /* Example: Dark Green */
+  color: #006600;
 }
 
 .cell-output-error .ansi-cyan-fg,
 .cell-output-error .ansi-bright-cyan-fg {
   /* Replace light cyan/bright cyan with a darker, accessible cyan/teal */
-  color: #006161; /* Example: Dark Teal */
+  color: #006161;
 }
 
-/* Add other colors as needed if they also fail contrast checks */
 .cell-output-error .ansi-yellow-fg,
 .cell-output-error .ansi-bright-yellow-fg {
-  color: #886A00; /* Example: Dark Gold */
+  color: #886A00;
 }
 
 /* Ensure the general error text is also high contrast (often dark red/maroon) */
 .cell-output-error {
   /* This targets the error text that isn't specifically ANSI colored */
   color: #990000; /* Darker red for general error text */
+}
+
+/*
+ * Part of the output is highlighted with a yellow background. Force all text
+ * on yellow backgrounds to be black for maximum contrast.
+ */
+.cell-output-error .ansi-yellow-bg,
+.cell-output-error .ansi-bright-yellow-bg {  
+  color: #000000 !important; 
 }