diff --git a/src/main/java/software/amazon/cloudwatchlogs/emf/environment/AgentBasedEnvironment.java b/src/main/java/software/amazon/cloudwatchlogs/emf/environment/AgentBasedEnvironment.java
index f401dd1e..ef27d4ac 100644
--- a/src/main/java/software/amazon/cloudwatchlogs/emf/environment/AgentBasedEnvironment.java
+++ b/src/main/java/software/amazon/cloudwatchlogs/emf/environment/AgentBasedEnvironment.java
@@ -45,7 +45,17 @@ public String getName() {
 
     @Override
     public String getLogGroupName() {
-        return config.getLogGroupName().orElse(getName() + "-metrics");
+        if (config.getLogGroupName().isPresent()) {
+            return config.getLogGroupName().get();
+        } else {
+            String serviceName = getName();
+            // for ECS services, replace "repo:tag" format with "repo-tag" to satisfy
+            // log group regex
+            if (serviceName.indexOf(':') != -1) {
+                serviceName = serviceName.replaceAll(":", "-");
+            }
+            return serviceName + "-metrics";
+        }
     }
 
     public String getLogStreamName() {
diff --git a/src/test/java/software/amazon/cloudwatchlogs/emf/environment/ECSEnvironmentTest.java b/src/test/java/software/amazon/cloudwatchlogs/emf/environment/ECSEnvironmentTest.java
index 475648fd..eef757c7 100644
--- a/src/test/java/software/amazon/cloudwatchlogs/emf/environment/ECSEnvironmentTest.java
+++ b/src/test/java/software/amazon/cloudwatchlogs/emf/environment/ECSEnvironmentTest.java
@@ -150,6 +150,14 @@ public void testGetLogGroupNameReturnNonEmpty() {
         assertEquals(environment.getLogGroupName(), Constants.UNKNOWN + "-metrics");
     }
 
+    @Test
+    public void testGetLogGroupNameReplaceColon() {
+        String serviceName = "testRepo:testTag";
+        when(config.getServiceName()).thenReturn(Optional.of(serviceName));
+
+        assertEquals(environment.getLogGroupName(), "testRepo-testTag-metrics");
+    }
+
     @Test
     public void testConfigureContext() throws UnknownHostException {
         PowerMockito.mockStatic(SystemWrapper.class);