From 041bbf8bdfd3dc37391d44d19699f08093de8d6f Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Thu, 17 Jul 2025 11:39:23 +0000
Subject: [PATCH] Allow uppercase letters in gray/grey color names, GitHub
 issue 4560 from Pavel Roskin.

---
 colour.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/colour.c b/colour.c
index 903090d3..791c5fd5 100644
--- a/colour.c
+++ b/colour.c
@@ -986,7 +986,8 @@ colour_byname(const char *name)
 	int		 c;
 	const char	*errstr;
 
-	if (strncmp(name, "grey", 4) == 0 || strncmp(name, "gray", 4) == 0) {
+	if (strncasecmp(name, "grey", 4) == 0 ||
+	    strncasecmp(name, "gray", 4) == 0) {
 		if (name[4] == '\0')
 			return (0xbebebe|COLOUR_FLAG_RGB);
 		c = strtonum(name + 4, 0, 100, &errstr);