diff --git a/package.json b/package.json
index 03ae70a6c..dcf17e386 100644
--- a/package.json
+++ b/package.json
@@ -52,13 +52,13 @@
     "vm-compatibility-layer": "0.1.0"
   },
   "packageDependencies": {
-    "atom-dark-syntax": "0.14.0",
+    "atom-dark-syntax": "0.15.0",
     "atom-dark-ui": "0.23.0",
-    "atom-light-syntax": "0.14.0",
+    "atom-light-syntax": "0.15.0",
     "atom-light-ui": "0.22.0",
-    "base16-tomorrow-dark-theme": "0.12.0",
-    "solarized-dark-syntax": "0.10.0",
-    "solarized-light-syntax": "0.6.0",
+    "base16-tomorrow-dark-theme": "0.13.0",
+    "solarized-dark-syntax": "0.11.0",
+    "solarized-light-syntax": "0.7.0",
     "archive-view": "0.26.0",
     "autocomplete": "0.24.0",
     "autoflow": "0.15.0",
diff --git a/static/variables/syntax-variables.less b/static/variables/syntax-variables.less
index fb6895405..016a7901f 100644
--- a/static/variables/syntax-variables.less
+++ b/static/variables/syntax-variables.less
@@ -1,8 +1,29 @@
-// This file has fallback variables. It specifies the syntax variables that
-// themes must implement.
+// This file has fallback variables. It specifies all syntax variables that
+// themes must implement if they include a syntax-variables.less file.
 
-// Colors
+// General colors
+@syntax-text-color: #333;
+@syntax-cursor-color: #333;
+@syntax-selection-color: #69c;
+@syntax-background-color: #fff;
 
-@syntax-color-added: #5293d8;
-@syntax-color-modified: #f78a46;
-@syntax-color-removed: #c00;
+// Guide colors
+@syntax-wrap-guide-color: #ccc;
+@syntax-indent-guide-color: #ccc;
+@syntax-invisible-character-color: #ccc;
+
+// For find and replace markers
+@syntax-result-marker-color: #444;
+@syntax-result-marker-color-selected: #000;
+
+// Gutter colors
+@syntax-gutter-text-color: #333;
+@syntax-gutter-text-color-selected: #000;
+@syntax-gutter-background-color: #ccc;
+@syntax-gutter-background-color-selected: #eee;
+
+// For git diff info. i.e. in the gutter
+@syntax-color-added: green;
+@syntax-color-modified: orange;
+@syntax-color-removed: red;
+@syntax-color-renamed: blue;