diff --git a/glk/osglk.c b/glk/osglk.c
index b44e46b..80193f0 100644
--- a/glk/osglk.c
+++ b/glk/osglk.c
@@ -151,7 +151,7 @@ int os_init(int *argc, char *argv[], const char *prompt,
         mainfg = 0;
 
     if (!glk_style_measure(mainwin, style_Normal, stylehint_BackColor, &mainbg))
-        mainbg = 0;
+        mainbg = 0xFFFFFFFF;
 
     /* get default colors for status window */
     statuswin = glk_window_open(mainwin,
diff --git a/glk/osglkban.c b/glk/osglkban.c
index d8be530..854cc02 100644
--- a/glk/osglkban.c
+++ b/glk/osglkban.c
@@ -21,7 +21,9 @@
  *                                                                            *
  *****************************************************************************/
 
-/* osansi4.c -- glk banner interface */
+/* osglkban.c -- glk banner interface */
+
+#include <stdbool.h>
 
 #include "os.h"
 #include "glk.h"
@@ -57,6 +59,7 @@ typedef struct os_banner_s
     glui32 fgcustom;                /* custom colors */
     glui32 bgcustom;
     glui32 bgtrans;
+    bool invisible;
 
     contentid_t contents;           /* window contents */
     glui32 style;                   /* active Glk style value */
@@ -130,6 +133,8 @@ osbanid_t os_banner_init(void)
     instance->cheight = 0;
     instance->cwidth = 0;
 
+    instance->invisible = FALSE;
+
     instance->contents = 0;
     instance->style = style_Normal;
     instance->newline = 0;
@@ -257,6 +262,12 @@ void os_banner_styles_apply (osbanid_t banner)
     glk_stylehint_set(banner->type, style_User1, stylehint_BackColor, banner->fgcolor);
     glk_stylehint_set(banner->type, style_User2, stylehint_BackColor, bgcustom);
 
+    // Use blockquote for invisible text - set both to the banner background
+    if (mainbg != 0xFFFFFFFF) {
+        glk_stylehint_set(banner->type, style_BlockQuote, stylehint_Proportional, propval);
+        glk_stylehint_set(banner->type, style_BlockQuote, stylehint_TextColor, banner->bgcolor);
+        glk_stylehint_set(banner->type, style_BlockQuote, stylehint_BackColor, banner->bgcolor);
+    }
 }
 
 void os_banner_styles_reset (void)
@@ -282,6 +293,12 @@ void os_banner_styles_reset (void)
     glk_stylehint_clear(wintype_AllTypes, style_User1, stylehint_BackColor);
     glk_stylehint_clear(wintype_AllTypes, style_User2, stylehint_BackColor);
 
+    if (mainbg != 0xFFFFFFFF) {
+        glk_stylehint_clear(wintype_AllTypes, style_BlockQuote, stylehint_Proportional);
+        glk_stylehint_clear(wintype_AllTypes, style_BlockQuote, stylehint_TextColor);
+        glk_stylehint_clear(wintype_AllTypes, style_BlockQuote, stylehint_BackColor);
+    }
+
 #ifdef GARGLK
     /* reset our default colors with a superfluous hint */
     glk_stylehint_set(wintype_AllTypes, style_Normal, stylehint_TextColor, mainfg);
@@ -679,7 +696,20 @@ void os_banner_disp(void *banner_handle, const char *txt, size_t len)
     update->x = banner->x;
     update->y = banner->y;
 
-    banner_contents_insert(update, txt, len);
+    // If invisible, overwrite with spaces
+    if (banner->invisible) {
+        char *spaces = malloc(sizeof(char) * (len));
+        if (!spaces) {
+            return;
+        }
+        memset(spaces, ' ', len);
+        banner_contents_insert(update, spaces, len);
+        free(spaces);
+    }
+    else {
+        banner_contents_insert(update, txt, len);
+    }
+
     banner_contents_display(update);
 }
 
@@ -722,6 +752,8 @@ void os_banner_set_color(void *banner_handle, os_color_t fg, os_color_t bg)
     glui32 reversed = 0;
     glui32 normal = 0;
     glui32 transparent = 0;
+    bool invisible = FALSE;
+    banner->invisible = FALSE;
 
     /* evaluate parameters */
 
@@ -730,6 +762,10 @@ void os_banner_set_color(void *banner_handle, os_color_t fg, os_color_t bg)
         switch(fg)
         {
             case OS_COLOR_P_TEXTBG:
+                if (bg == OS_COLOR_P_TRANSPARENT) {
+                    invisible = TRUE;
+                    break;
+                }
             case OS_COLOR_P_STATUSBG:
                 reversed = 1;
                 break;
@@ -760,7 +796,17 @@ void os_banner_set_color(void *banner_handle, os_color_t fg, os_color_t bg)
 
     /* choose a style */
 
-    if (normal && transparent)
+    if (invisible) {
+        // If we can't measure the background colour, then use the replace-with-spaces method
+        if (mainbg == 0xFFFFFFFF) {
+            banner->style = style_Preformatted;
+            banner->invisible = TRUE;
+        }
+        else {
+            banner->style = style_BlockQuote;
+        }
+    }
+    else if (normal && transparent)
         banner->style = style_Normal;
     else if (reversed)
         banner->style = style_User1;