disallow short hex

lang/en.php

@@ -48,7 +48,7 @@ return [
 	'term.explain_scheme' => '
 		To select default text and background color, click on the
 		preview palette. Alternatively, use numbers 0-15 for theme colors, 16-255 for standard 
-		colors and hex (#FFF or #FFFFFF) for True Color (24-bit).
+		colors and hex (#FFFFFF) for True Color (24-bit).
 		',
 
 	'term.fgbg_presets' => 'Presets',

pages/cfg_term.php

@@ -299,12 +299,12 @@
 		var bg = $('#default_bg').val();
 
 		if (/^\d+$/.test(fg)) fg = +fg;
-		else if (!/^#[\da-f]{3,6}$/i.test(fg)) {
+		else if (!/^#[\da-f]{6}$/i.test(fg)) {
 		  fg = 'black';
 		}
 
 		if (/^\d+$/.test(bg)) bg = +bg;
-		else if (!/^#[\da-f]{3,6}$/i.test(bg)) {
+		else if (!/^#[\da-f]{6}$/i.test(bg)) {
 		  bg = 'black';
 		}