diff --git a/diff-so-fancy b/diff-so-fancy
index e729b20..e982ba0 100755
--- a/diff-so-fancy
+++ b/diff-so-fancy
@@ -931,7 +931,7 @@ sub git_ansi_color {
 	# It's a simple 16 color OG ansi
 	} elsif ($fg) {
 		my $bright    = $fg =~ s/bright//;
-		my $color_num = $colors->{$fg} + 30;
+		my $color_num = ($colors->{$fg} // 0) + 30;
 
 		if ($bright) { $color_num += 60; } # Set bold
 
@@ -952,7 +952,7 @@ sub git_ansi_color {
 	# It's a simple 16 color OG ansi
 	} elsif ($bg) {
 		my $bright    = $bg =~ s/bright//;
-		my $color_num = $colors->{$bg} + 40;
+		my $color_num = ($colors->{$bg} // 0) + 40;
 
 		if ($bright) { $color_num += 60; } # Set bold