diff --git a/installer/templates/phx_web/components/core_components.ex b/installer/templates/phx_web/components/core_components.ex
index 83ac2a9f32..c93f726121 100644
--- a/installer/templates/phx_web/components/core_components.ex
+++ b/installer/templates/phx_web/components/core_components.ex
@@ -265,7 +265,7 @@ defmodule <%= @web_namespace %>.CoreComponents do
       <select
         id={@id}
         name={@name}
-        class="mt-2 block w-full rounded-md border border-gray-300 bg-white shadow-sm focus:border-zinc-400 focus:ring-0 sm:text-sm"
+        class="mt-2 block w-full rounded-md border border-zinc-300 bg-white shadow-sm focus:border-zinc-400 focus:ring-0 sm:text-sm"
         multiple={@multiple}
         {@rest}
       >
diff --git a/priv/templates/phx.gen.live/core_components.ex b/priv/templates/phx.gen.live/core_components.ex
index 83ac2a9f32..c93f726121 100644
--- a/priv/templates/phx.gen.live/core_components.ex
+++ b/priv/templates/phx.gen.live/core_components.ex
@@ -265,7 +265,7 @@ defmodule <%= @web_namespace %>.CoreComponents do
       <select
         id={@id}
         name={@name}
-        class="mt-2 block w-full rounded-md border border-gray-300 bg-white shadow-sm focus:border-zinc-400 focus:ring-0 sm:text-sm"
+        class="mt-2 block w-full rounded-md border border-zinc-300 bg-white shadow-sm focus:border-zinc-400 focus:ring-0 sm:text-sm"
         multiple={@multiple}
         {@rest}
       >