-foreach ( $themes as $theme ) : ?>
-<div class="theme<?php if ( $theme['active'] ) echo ' active'; ?>">
+foreach ( $themes as $theme ) :
+ $aria_action = esc_attr( $theme['id'] . '-action' );
+ $aria_name = esc_attr( $theme['id'] . '-name' );
+ ?>
+<div class="theme<?php if ( $theme['active'] ) echo ' active'; ?>" tabindex="0" aria-describedby="<?php echo $aria_action . ' ' . $aria_name; ?>">