diff --git a/challenges/html5-and-css.json b/challenges/html5-and-css.json
index 926676c9e4..ab8efd79ca 100644
--- a/challenges/html5-and-css.json
+++ b/challenges/html5-and-css.json
@@ -3508,7 +3508,7 @@
       ],
       "tests": [
         "assert($(\"body\").css(\"background-color\") === \"rgb(255, 0, 0)\", 'Give your <code>body</code> element the <code>background-color</code> of red.')",
-        "assert(editor.match(/#FF0000/g) && editor.match(/#FF0000/g).length > 0, 'Use the <code>hex code</code> for the color red instead of the word <code>red</code>. For example <code>body { color&#58; #FF0000; }</code>.')"
+        "assert(editor.match(/#FF0000/ig) && editor.match(/#FF0000/ig).length > 0, 'Use the <code>hex code</code> for the color red instead of the word <code>red</code>. For example <code>body { color&#58; #FF0000; }</code>.')"
       ],
       "challengeSeed": [
         "<style>",
@@ -3543,7 +3543,7 @@
       ],
       "tests": [
         "assert($(\"body\").css(\"background-color\") === \"rgb(0, 255, 0)\", 'Give your <code>body</code> element the <code>background-color</code> of <code>green</code>.')",
-        "assert(editor.match(/#00[Ff]{2}00/g) && editor.match(/#00[Ff]{2}00/g).length > 0, 'Use the <code>hex code</code> for the color green instead of the word <code>green</code>. For example <code>body { color&#58; #00FF00; }</code>.')"
+        "assert(editor.match(/#00FF00/ig) && editor.match(/#00FF00/ig).length > 0, 'Use the <code>hex code</code> for the color green instead of the word <code>green</code>. For example <code>body { color&#58; #00FF00; }</code>.')"
       ],
       "challengeSeed": [
         "<style>",
@@ -3578,7 +3578,7 @@
       ],
       "tests": [
         "assert($(\"body\").css(\"background-color\") === \"rgb(0, 0, 255)\", 'Give your <code>body</code> element the <code>background-color</code> of blue.')",
-        "assert(editor.match(/#0000FF/g) && editor.match(/#0000FF/g).length > 0, 'Use the <code>hex code</code> for the color blue instead of the word <code>blue</code>. For example <code>body { color&#58; #0000FF; }</code>.')"
+        "assert(editor.match(/#0000FF/ig) && editor.match(/#0000FF/ig).length > 0, 'Use the <code>hex code</code> for the color blue instead of the word <code>blue</code>. For example <code>body { color&#58; #0000FF; }</code>.')"
       ],
       "challengeSeed": [
         "<style>",
@@ -3613,7 +3613,7 @@
       ],
       "tests": [
         "assert($(\"body\").css(\"background-color\") === \"rgb(255, 165, 0)\", 'Give your <code>body</code> element the <code>background-color</code> of orange.')",
-        "assert(editor.match(/#FFA500/g) && editor.match(/#FFA500/g).length > 0, 'Use the <code>hex code</code> for the color orange instead of the word <code>orange</code>. For example <code>body { color&#58; #FFA500; }</code>.')"
+        "assert(editor.match(/#FFA500/ig) && editor.match(/#FFA500/ig).length > 0, 'Use the <code>hex code</code> for the color orange instead of the word <code>orange</code>. For example <code>body { color&#58; #FFA500; }</code>.')"
       ],
       "challengeSeed": [
         "<style>",