diff --git a/lib/ace/theme/clouds_midnight.css b/lib/ace/theme/clouds_midnight.css
index f54c7dcb..75d96274 100644
--- a/lib/ace/theme/clouds_midnight.css
+++ b/lib/ace/theme/clouds_midnight.css
@@ -9,7 +9,7 @@
 
 .ace-clouds-midnight .ace_gutter {
   background: #232323;
-  color: #333;
+  color: #929292;
 }
 
 .ace-clouds-midnight .ace_print_margin {
diff --git a/lib/ace/theme/cobalt.css b/lib/ace/theme/cobalt.css
index ad1cd8a2..5b82122b 100644
--- a/lib/ace/theme/cobalt.css
+++ b/lib/ace/theme/cobalt.css
@@ -9,7 +9,7 @@
 
 .ace-cobalt .ace_gutter {
   background: #011e3a;
-  color: #333;
+  color: #fff;
 }
 
 .ace-cobalt .ace_print_margin {
diff --git a/lib/ace/theme/idle_fingers.css b/lib/ace/theme/idle_fingers.css
index 603295eb..ad0e0840 100644
--- a/lib/ace/theme/idle_fingers.css
+++ b/lib/ace/theme/idle_fingers.css
@@ -9,7 +9,7 @@
 
 .ace-idle-fingers .ace_gutter {
   background: #3b3b3b;
-  color: #333;
+  color: #fff;
 }
 
 .ace-idle-fingers .ace_print_margin {
diff --git a/lib/ace/theme/kr_theme.css b/lib/ace/theme/kr_theme.css
index 3ce6a62b..b790ea1b 100644
--- a/lib/ace/theme/kr_theme.css
+++ b/lib/ace/theme/kr_theme.css
@@ -9,7 +9,7 @@
 
 .ace-kr-theme .ace_gutter {
   background: #1c1917;
-  color: #333;
+  color: #FCFFE0;
 }
 
 .ace-kr-theme .ace_print_margin {
diff --git a/lib/ace/theme/merbivore.css b/lib/ace/theme/merbivore.css
index e8b62802..09a3bf09 100644
--- a/lib/ace/theme/merbivore.css
+++ b/lib/ace/theme/merbivore.css
@@ -8,8 +8,8 @@
 }
 
 .ace-merbivore .ace_gutter {
-  background: #e8e8e8;
-  color: #333;
+  background: #202020;
+  color: #E6E1DC;
 }
 
 .ace-merbivore .ace_print_margin {
diff --git a/lib/ace/theme/merbivore_soft.css b/lib/ace/theme/merbivore_soft.css
index 90d37bf7..e4593535 100644
--- a/lib/ace/theme/merbivore_soft.css
+++ b/lib/ace/theme/merbivore_soft.css
@@ -9,7 +9,7 @@
 
 .ace-merbivore-soft .ace_gutter {
   background: #262424;
-  color: #333;
+  color: #E6E1DC;
 }
 
 .ace-merbivore-soft .ace_print_margin {
diff --git a/lib/ace/theme/mono_industrial.css b/lib/ace/theme/mono_industrial.css
index 6467a33f..77e8569b 100644
--- a/lib/ace/theme/mono_industrial.css
+++ b/lib/ace/theme/mono_industrial.css
@@ -9,7 +9,7 @@
 
 .ace-mono-industrial .ace_gutter {
   background: #1d2521;
-  color: #333;
+  color: #fff;
 }
 
 .ace-mono-industrial .ace_print_margin {
diff --git a/lib/ace/theme/pastel_on_dark.css b/lib/ace/theme/pastel_on_dark.css
index 3fd17617..8c480937 100644
--- a/lib/ace/theme/pastel_on_dark.css
+++ b/lib/ace/theme/pastel_on_dark.css
@@ -9,7 +9,7 @@
 
 .ace-pastel-on-dark .ace_gutter {
   background: #353030;
-  color: #333;
+  color: #8F938F;
 }
 
 .ace-pastel-on-dark .ace_print_margin {
diff --git a/lib/ace/theme/tomorrow.css b/lib/ace/theme/tomorrow.css
index ca563c3d..e65d3a5a 100644
--- a/lib/ace/theme/tomorrow.css
+++ b/lib/ace/theme/tomorrow.css
@@ -9,7 +9,7 @@
 
 .ace-tomorrow .ace_gutter {
   background: #f6f6f6;
-  color: #333;
+  color: #4D4D4C;
 }
 
 .ace-tomorrow .ace_print_margin {
diff --git a/lib/ace/theme/tomorrow_night.css b/lib/ace/theme/tomorrow_night.css
index ab8bc0dd..a86eb09f 100644
--- a/lib/ace/theme/tomorrow_night.css
+++ b/lib/ace/theme/tomorrow_night.css
@@ -9,7 +9,7 @@
 
 .ace-tomorrow-night .ace_gutter {
   background: #25282c;
-  color: #333;
+  color: #C5C8C6;
 }
 
 .ace-tomorrow-night .ace_print_margin {
diff --git a/lib/ace/theme/tomorrow_night_bright.css b/lib/ace/theme/tomorrow_night_bright.css
index 077f6bb2..a2b6a6df 100644
--- a/lib/ace/theme/tomorrow_night_bright.css
+++ b/lib/ace/theme/tomorrow_night_bright.css
@@ -9,7 +9,7 @@
 
 .ace-tomorrow-night-bright .ace_gutter {
   background: #1a1a1a;
-  color: #333;
+  color: #DEDEDE;
 }
 
 .ace-tomorrow-night-bright .ace_print_margin {
diff --git a/lib/ace/theme/tomorrow_night_eighties.css b/lib/ace/theme/tomorrow_night_eighties.css
index 001b1ff4..c3d4ce77 100644
--- a/lib/ace/theme/tomorrow_night_eighties.css
+++ b/lib/ace/theme/tomorrow_night_eighties.css
@@ -9,7 +9,7 @@
 
 .ace-tomorrow-night-eighties .ace_gutter {
   background: #272727;
-  color: #333;
+  color: #CCC;
 }
 
 .ace-tomorrow-night-eighties .ace_print_margin {
diff --git a/lib/ace/theme/twilight.css b/lib/ace/theme/twilight.css
index 3bb7ec84..e7aeb58c 100644
--- a/lib/ace/theme/twilight.css
+++ b/lib/ace/theme/twilight.css
@@ -9,7 +9,7 @@
 
 .ace-twilight .ace_gutter {
   background: #232323;
-  color: #333;
+  color: #F8F8F8;
 }
 
 .ace-twilight .ace_print_margin {
diff --git a/lib/ace/theme/vibrant_ink.css b/lib/ace/theme/vibrant_ink.css
index e07e5913..a1512591 100644
--- a/lib/ace/theme/vibrant_ink.css
+++ b/lib/ace/theme/vibrant_ink.css
@@ -9,7 +9,7 @@
 
 .ace-vibrant-ink .ace_gutter {
   background: #1a1a1a;
-  color: #333;
+  color: white;
 }
 
 .ace-vibrant-ink .ace_print_margin {