diff --git a/client/src/components/layouts/prism-night.css b/client/src/components/layouts/prism-night.css
index 382000cafe..e30ef66478 100644
--- a/client/src/components/layouts/prism-night.css
+++ b/client/src/components/layouts/prism-night.css
@@ -51,6 +51,13 @@ padding in night mode */
   background: var(--primary-background);
 }
 
+.night pre[class*='language-']::selection,
+.night pre[class*='language-'] ::selection,
+.night code[class*='language-']::selection,
+.night code[class*='language-'] ::selection {
+  background: var(--selection-color);
+}
+
 /* Inline code */
 .night :not(pre) > code[class*='language-'] {
   padding: 0.1em;
diff --git a/client/src/components/layouts/prism.css b/client/src/components/layouts/prism.css
index 91590f678f..611a4cf403 100644
--- a/client/src/components/layouts/prism.css
+++ b/client/src/components/layouts/prism.css
@@ -7,6 +7,13 @@ pre[class*='language-'] {
   background: var(--primary-background);
 }
 
+.default pre[class*='language-']::selection,
+.default pre[class*='language-'] ::selection,
+.default code[class*='language-']::selection,
+.default code[class*='language-'] ::selection {
+  background: var(--selection-color);
+}
+
 * {
   text-shadow: none !important;
 }