Add ability to set theme colors by hex code

internal/config/style.go

@@ -329,7 +329,10 @@ func (s *Styles) Update() {
 func AsColor(c string) tcell.Color {
 	if color, ok := tcell.ColorNames[c]; ok {
 		return color
+	} else {
+		// Use tcell.GetColor to support hex codes.
+		// "Creates a Color from a color name (W3C name). A hex value may be supplied as a string in the format "#ffffff"."
+		color := tcell.GetColor(c)
+		return color
 	}
-
-	return tcell.ColorPink
 }