Doing: print -P %F{10}hello | cat -v

The debug logs (code at the bottom):

Yes, using termcap, color:10 / tccolors:256 / use_termcap:268435456
Yes, using termcap, color:10 / tccolors:256 / use_termcap:268435456
NOT, using termcap, 7 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
Yes, using termcap, 63 / 256 / 268435456
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 7 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
Yes, using termcap, 63 / 256 / 268435456
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]


Doing: print -P %F{5}hello | cat -v

Yes, using termcap, 5 / 256 / 268435456
Yes, using termcap, 5 / 256 / 268435456
NOT, using termcap, 7 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
Yes, using termcap, 63 / 256 / 268435456
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 7 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]
Yes, using termcap, 63 / 256 / 268435456
NOT, using termcap, 0 / 256 / 0
Appended [^[[38;5;] to the colseq_buf[^[[38;5;]




diff --git a/Src/prompt.c b/Src/prompt.c
index 959ed8e3d..1941b8ec9 100644
--- a/Src/prompt.c
+++ b/Src/prompt.c
@@ -1987,6 +1987,14 @@ set_colour_attribute(int atr, int fg_bg, int flags)
 	 */
 	if (tccan(tc) && (tccolours < 0 || colour < tccolours))
 	{
+            
+            FILE *f = fopen("/tmp/reply", "a+");
+            if ( f ) {
+                fprintf(f, "Yes, using termcap, color:%d / tccolours:%d / use_termcap:%d\n", colour, tccolours, use_termcap);
+                fflush(f);
+                fclose(f);
+            }
+
 	    if (is_prompt)
 	    {
 		if (!bv->dontcount) {
@@ -2010,6 +2018,13 @@ set_colour_attribute(int atr, int fg_bg, int flags)
 	 */
 	if (colour > 7)
 	    return;
+    } else {
+        FILE *f = fopen("/tmp/reply", "a+");
+        if ( f ) {
+            fprintf(f, "NOT, using termcap, %d / %d / %d\n", colour, tccolours, use_termcap);
+            fflush(f);
+            fclose(f);
+        }
     }
 
     if ((do_free = (colseq_buf == NULL))) {
@@ -2019,6 +2034,11 @@ set_colour_attribute(int atr, int fg_bg, int flags)
 
     strcpy(colseq_buf, fg_bg_sequences[fg_bg].start);
 
+    FILE *f = fopen("/tmp/reply", "a+");
+    fprintf(f, "Appended [%s] to the colseq_buf[%s]\n", fg_bg_sequences[fg_bg].start, colseq_buf);
+    fflush(f);
+    fclose(f);
+
     ptr = colseq_buf + strlen(colseq_buf);
     if (def) {
 	strcpy(ptr, fg_bg_sequences[fg_bg].def);