diff --git a/src/tuxedo_keyboard_common.h b/src/tuxedo_keyboard_common.h
index f613f39..3a52b2a 100644
--- a/src/tuxedo_keyboard_common.h
+++ b/src/tuxedo_keyboard_common.h
@@ -103,11 +103,11 @@ static struct color_list_t color_list = {
 /**
  * Looks up a color in the color_list
  * 
- * Returns found color, or -1 if string did not match
+ * Returns found color value, or 0xffffffff if string did not match
  */
 static u32 color_lookup(const struct color_list_t *color_list, const char *color_name)
 {
-	u32 found_color = -1;
+	u32 found_color = 0xffffffff;
 	int i;
 	for (i = 0; i < color_list->size; ++i) {
 		if (strcmp(color_list->colors[i].name, color_name) == 0) {
diff --git a/src/uniwill_keyboard.h b/src/uniwill_keyboard.h
index 27670f8..77d8e25 100644
--- a/src/uniwill_keyboard.h
+++ b/src/uniwill_keyboard.h
@@ -308,7 +308,7 @@ static int uniwill_keyboard_probe(struct platform_device *dev)
 	// Initialize keyboard backlight driver state according to parameters
 	if (param_brightness > UNIWILL_BRIGHTNESS_MAX) param_brightness = UNIWILL_BRIGHTNESS_DEFAULT;
 	kbd_led_state_uw.brightness = param_brightness;
-	if (color_lookup(&color_list, param_color) != -1) kbd_led_state_uw.color = color_lookup(&color_list, param_color);
+	if (color_lookup(&color_list, param_color) <= (u32) 0xffffff) kbd_led_state_uw.color = color_lookup(&color_list, param_color);
 	else kbd_led_state_uw.color = UNIWILL_COLOR_DEFAULT;
 
 	// Update keyboard according to the current state