fix: 0-70% light red 70%-100% interpolate to red

Signed-off-by: KhalilSelyan <khalil@leodrive.ai>

Author: KhalilSelyan

common/autoware_overlay_rviz_plugin/autoware_overlay_rviz_plugin/src/speed_limit_display.cpp

@@ -80,7 +80,7 @@ void SpeedLimitDisplay::drawSpeedLimitIndicator(QPainter & painter, const QRectF
   // Calculate the ratio between the current speed and the speed limit
   double speed_to_limit_ratio = current_speed_ / current_limit;
 
-  QColor borderColor = gray;
+  QColor borderColor = colorMin;
 
   if (speed_to_limit_ratio > 0.7 && current_limit > 0.0) {
     // Adjust the interpolation to start more gradually