diff --git a/src/themes/scss/theme/modules/_syntax.scss b/src/themes/scss/theme/modules/_syntax.scss
index 26a97ca..29bd237 100644
--- a/src/themes/scss/theme/modules/_syntax.scss
+++ b/src/themes/scss/theme/modules/_syntax.scss
@@ -128,6 +128,19 @@
         --color-syntax-NameVariableGlobal: #ffaa10;
         --color-syntax-NameVariableInstance: #ffaa10;
         --color-syntax-TextWhitespace: #7f8699;
+
+        /* Color: diff */
+        --color-diff-added-word-bg: hsl(120, 25.5%, 32%);
+        --color-diff-removed-word-bg: hsl(0, 37%, 32%);
+        --color-diff-added-row-bg: hsla(123, 36%, 43%, 0.1);
+        --color-diff-added-row-linesnum-bg: hsla(123, 36%, 40%, 0.2);
+        --color-diff-added-row-border: hsl(134.4, 20%, 24%);
+        --color-diff-removed-row-bg: hsl(0, 20%, 20%);
+        --color-diff-removed-row-linesnum-bg: hsl(0, 25%, 23%);
+        --color-diff-removed-row-border: hsl(0, 19%, 33%);
+        --color-diff-moved-row-bg: hsl(59, 31%, 38.6%);
+        --color-diff-moved-row-border: hsl(69.2, 46%, 61%);
+        --color-diff-inactive: hsl(229, 14%, 13%);
     }
 
     .chroma .bp {