diff --git a/ui/scss/themes/dark.scss b/ui/scss/themes/dark.scss
index 6d39ddbb5..68c2746a3 100644
--- a/ui/scss/themes/dark.scss
+++ b/ui/scss/themes/dark.scss
@@ -31,7 +31,7 @@
   --color-card-background: #2c3237;
   --color-card-background-highlighted: #384046;
   --color-header-background: #434b53;
-  --color-file-viewer-background: #212529;
+  --color-file-viewer-background: var(--color-white);
   --color-tab-text: var(--color-white);
   --color-tabs-background: #434b53;
   --color-tab-divider: var(--color-white);
diff --git a/ui/scss/themes/light.scss b/ui/scss/themes/light.scss
index 82845fe14..ca989c19e 100644
--- a/ui/scss/themes/light.scss
+++ b/ui/scss/themes/light.scss
@@ -29,7 +29,7 @@
   --color-card-background: #ffffff;
   --color-card-background-highlighted: #f6faff;
   --color-list-header: #fff;
-  --color-file-viewer-background: #212529;
+  --color-file-viewer-background: var(--color-white);
   --color-tabs-background: var(--color-secondary-alt);
   --color-tab-divider: var(--color-secondary);