diff --git a/sketch/obd2_gauge/meter.h b/sketch/obd2_gauge/meter.h
index 4008aab..5003c59 100644
--- a/sketch/obd2_gauge/meter.h
+++ b/sketch/obd2_gauge/meter.h
@@ -179,11 +179,24 @@ inline void drawBarBlock(uint8_t i, uint16_t color) {
         if (d < min_d) min_d = d;
       }
       if (min_d <= -0.5f) continue;
-      if (min_d >= 0.5f) {
-        tft.drawPixel(x, y, color);
+      if (color == TFT_BLACK) {
+        tft.drawPixel(x, y, TFT_BLACK);
+      } else if (color == TFT_DARKGREY) { // Outline only (solo las aristas)
+        if (min_d > 1.5f) {
+          tft.drawPixel(x, y, TFT_BLACK);
+        } else if (min_d >= 0.5f) {
+          tft.drawPixel(x, y, TFT_DARKGREY);
+        } else {
+          uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
+          tft.drawPixel(x, y, TFT_DARKGREY, alpha, TFT_BLACK);
+        }
       } else {
-        uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
-        tft.drawPixel(x, y, color, alpha, TFT_BLACK);
+        if (min_d >= 0.5f) {
+          tft.drawPixel(x, y, color);
+        } else {
+          uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
+          tft.drawPixel(x, y, color, alpha, TFT_BLACK);
+        }
       }
     }
   }
@@ -294,11 +307,24 @@ inline void drawQuadBarBlock(uint8_t cell, uint8_t i, uint16_t color) {
       }
       if (min_d <= -0.5f) continue;
       int16_t sx = ox + x;
-      if (min_d >= 0.5f) {
-        tft.drawPixel(sx, sy, color);
+      if (color == TFT_BLACK) {
+        tft.drawPixel(sx, sy, TFT_BLACK);
+      } else if (color == TFT_DARKGREY) { // Outline only (solo las aristas)
+        if (min_d > 1.3f) {
+          tft.drawPixel(sx, sy, TFT_BLACK);
+        } else if (min_d >= 0.5f) {
+          tft.drawPixel(sx, sy, TFT_DARKGREY);
+        } else {
+          uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
+          tft.drawPixel(sx, sy, TFT_DARKGREY, alpha, TFT_BLACK);
+        }
       } else {
-        uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
-        tft.drawPixel(sx, sy, color, alpha, TFT_BLACK);
+        if (min_d >= 0.5f) {
+          tft.drawPixel(sx, sy, color);
+        } else {
+          uint8_t alpha = (uint8_t)((min_d + 0.5f) * 255.0f);
+          tft.drawPixel(sx, sy, color, alpha, TFT_BLACK);
+        }
       }
     }
   }