diff --git a/BUILD.gn b/BUILD.gn
index 038e70430d..50346dfed1 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -34,6 +34,13 @@ config("deno_config") {
   if (is_win) {
     libs = [ "userenv.lib" ]
   }
+
+  if (is_clang) {
+    cflags = [
+      "-fcolor-diagnostics",
+      "-fansi-escape-codes",
+    ]
+  }
 }
 
 main_extern = [
diff --git a/build_extra/flatbuffers/BUILD.gn b/build_extra/flatbuffers/BUILD.gn
index aaf82422c5..b56731935e 100644
--- a/build_extra/flatbuffers/BUILD.gn
+++ b/build_extra/flatbuffers/BUILD.gn
@@ -17,6 +17,9 @@ config("flatbuffers_config") {
       # TODO: rust branch of flatbuffers has this warning.
       # This should be removed when the branch fixed.
       "-Wno-return-type",
+
+      "-fcolor-diagnostics",
+      "-fansi-escape-codes",
     ]
   }
 }