diff --git a/packages/block-library/src/image/index.php b/packages/block-library/src/image/index.php
index 0f284b126e9495..e62983b809a4c3 100644
--- a/packages/block-library/src/image/index.php
+++ b/packages/block-library/src/image/index.php
@@ -287,7 +287,7 @@ function block_core_image_render_lightbox( $block_content, $block ) {
             data-wp-on--mousewheel="actions.core.image.hideLightbox"
             data-wp-on--click="actions.core.image.hideLightbox"
             >
-                <button type="button" aria-label="$close_button_label" style="color: $close_button_color" class="close-button" data-wp-on--click="actions.core.image.hideLightbox">
+                <button type="button" aria-label="$close_button_label" style="fill: $close_button_color" class="close-button" data-wp-on--click="actions.core.image.hideLightbox">
                     $close_button_icon
                 </button>
                 <div class="lightbox-image-container">$initial_image_content</div>