diff --git a/packages/block-library/src/post-featured-image/edit.js b/packages/block-library/src/post-featured-image/edit.js
index 3f66acb7cddf2a..828ff26fb121b5 100644
--- a/packages/block-library/src/post-featured-image/edit.js
+++ b/packages/block-library/src/post-featured-image/edit.js
@@ -33,12 +33,9 @@ const placeholderIllustration = (
 		fill="none"
 		xmlns="http://www.w3.org/2000/svg"
 		viewBox="0 0 60 60"
-		preserveAspectRatio="xMidYMid slice" // @todo: "slice" matches the "cover" behavior, "meet" could be used for "container" and "fill" values.
+		preserveAspectRatio="none"
 	>
-		<Path
-			vectorEffect="non-scaling-stroke"
-			d="m61 32.622-13.555-9.137-15.888 9.859a5 5 0 0 1-5.386-.073l-9.095-5.989L1 37.5"
-		/>
+		<Path vectorEffect="non-scaling-stroke" d="M60 60 0 0" />
 	</SVG>
 );
 
diff --git a/packages/block-library/src/post-featured-image/editor.scss b/packages/block-library/src/post-featured-image/editor.scss
index 9b9038ba9845e2..4f4126a6ecad9c 100644
--- a/packages/block-library/src/post-featured-image/editor.scss
+++ b/packages/block-library/src/post-featured-image/editor.scss
@@ -48,7 +48,7 @@
 			bottom: 0;
 			left: 0;
 			border: $border-width dashed currentColor;
-			opacity: 0.3;
+			opacity: 0.4;
 			pointer-events: none;
 
 			// Inherit border radius from style variations.
@@ -93,7 +93,7 @@
 			height: 100%;
 			stroke: currentColor;
 			stroke-dasharray: 3;
-			opacity: 0.3;
+			opacity: 0.4;
 		}
 
 		// Show default placeholder height when not resized.
diff --git a/packages/block-library/src/site-logo/editor.scss b/packages/block-library/src/site-logo/editor.scss
index 0d0599998dbc78..af1a9fe59f2bd2 100644
--- a/packages/block-library/src/site-logo/editor.scss
+++ b/packages/block-library/src/site-logo/editor.scss
@@ -110,7 +110,7 @@
 			bottom: 0;
 			left: 0;
 			border: $border-width dashed currentColor;
-			opacity: 0.3;
+			opacity: 0.4;
 			pointer-events: none;
 
 			// Inherit border radius from style variations.
@@ -155,7 +155,7 @@
 			height: 100%;
 			stroke: currentColor;
 			stroke-dasharray: 3;
-			opacity: 0.3;
+			opacity: 0.4;
 		}
 	}