diff --git a/mod/assign/pix/layout-default.png b/mod/assign/pix/layout-default.png
index 6cae4100096..657d9844122 100644
Binary files a/mod/assign/pix/layout-default.png and b/mod/assign/pix/layout-default.png differ
diff --git a/mod/assign/pix/layout-default.svg b/mod/assign/pix/layout-default.svg
index 22f38456502..3a7ed5eeaf7 100644
--- a/mod/assign/pix/layout-default.svg
+++ b/mod/assign/pix/layout-default.svg
@@ -9,5 +9,5 @@
 	 xml:space="preserve" preserveAspectRatio="xMinYMid meet">
 <defs>
 </defs>
-<path style="fill:#999999;" d="M0,0v16h16V0H0z M2,14V2h6v12H2z M14,14h-4V2h4V14z"/>
+<path style="fill:#495057;" d="M0,0v16h16V0H0z M2,14V2h6v12H2z M14,14h-4V2h4V14z"/>
 </svg>
diff --git a/mod/assign/pix/layout-expand-left.png b/mod/assign/pix/layout-expand-left.png
index bd29cc6d0e9..bb37100f94f 100644
Binary files a/mod/assign/pix/layout-expand-left.png and b/mod/assign/pix/layout-expand-left.png differ
diff --git a/mod/assign/pix/layout-expand-left.svg b/mod/assign/pix/layout-expand-left.svg
index a4f65dd3d20..35ff6e80da8 100644
--- a/mod/assign/pix/layout-expand-left.svg
+++ b/mod/assign/pix/layout-expand-left.svg
@@ -9,5 +9,5 @@
 	 xml:space="preserve" preserveAspectRatio="xMinYMid meet">
 <defs>
 </defs>
-<path style="fill:#999999;" d="M0,0v16h16V0H0z M2,14V2h8v12H2z M14,14h-2V2h2V14z"/>
+<path style="fill:#495057;" d="M0,0v16h16V0H0z M2,14V2h8v12H2z M14,14h-2V2h2V14z"/>
 </svg>
diff --git a/mod/assign/pix/layout-expand-right.png b/mod/assign/pix/layout-expand-right.png
index d3a763b51c5..34cef17f787 100644
Binary files a/mod/assign/pix/layout-expand-right.png and b/mod/assign/pix/layout-expand-right.png differ
diff --git a/mod/assign/pix/layout-expand-right.svg b/mod/assign/pix/layout-expand-right.svg
index 44ecbdd3e41..3d2b87f3fde 100644
--- a/mod/assign/pix/layout-expand-right.svg
+++ b/mod/assign/pix/layout-expand-right.svg
@@ -9,5 +9,5 @@
 	 xml:space="preserve" preserveAspectRatio="xMinYMid meet">
 <defs>
 </defs>
-<path style="fill:#999999;" d="M0,0v16h16V0H0z M2,14V2h2v12H2z M14,14H6V2h8V14z"/>
+<path style="fill:#495057;" d="M0,0v16h16V0H0z M2,14V2h2v12H2z M14,14H6V2h8V14z"/>
 </svg>