diff --git a/_sass/whiteglass.scss b/_sass/whiteglass.scss
index e393e07b..14e5e1ef 100644
--- a/_sass/whiteglass.scss
+++ b/_sass/whiteglass.scss
@@ -1,3 +1,5 @@
+@use "sass:color";
+
 // Define defaults for each variable.
 $base-font-family: Bitter, "Apple SD Gothic Neo", "Noto Sans", "Source Han Sans", "Noto Sans CJK JP", "Source Han Sans JP", "Noto Sans CJK KR", "Source Han Sans KR", NanumBarunGothic, AppleGothic, "Malgun Gothic", Dotum, sans-serif !default;
 $monospace-font-family: Monaco, Menlo, Consolas, "Courier New", DotumChe, monospace !default;
diff --git a/_sass/whiteglass/_base.scss b/_sass/whiteglass/_base.scss
index 337c61be..b1e719a9 100644
--- a/_sass/whiteglass/_base.scss
+++ b/_sass/whiteglass/_base.scss
@@ -1,3 +1,5 @@
+@use "sass:color";
+
 /**
  * Reset some basic elements
  */
diff --git a/assets/main.scss b/assets/main.scss
index 55a7d1d0..cdf3a74b 100644
--- a/assets/main.scss
+++ b/assets/main.scss
@@ -2,6 +2,7 @@
 # Only the main Sass file needs front matter (the dashes are enough)
 ---
 @charset "utf-8";
+@use "sass:color";
 
 // Our variables
 $base-font-family: Bitter, "Apple SD Gothic Neo", AppleGothic, NanumBarunGothic, "Malgun Gothic", Dotum, sans-serif;