diff --git a/src/streamlit_extras/metric_cards/__init__.py b/src/streamlit_extras/metric_cards/__init__.py
index 520d0c6..1acacd3 100644
--- a/src/streamlit_extras/metric_cards/__init__.py
+++ b/src/streamlit_extras/metric_cards/__init__.py
@@ -3,11 +3,31 @@
 from streamlit_extras import extra
 from streamlit_extras.theme import st_theme
 
+theme = st_theme()
+
+DEFAULT_BACKGROUND_COLOR_LIGHT = "#FFF"
+DEFAULT_BORDER_COLOR_LIGHT = "#CCC"
+
+DEFAULT_BACKGROUND_COLOR_DARK = "#1B1C24"
+DEFAULT_BORDER_COLOR_DARK = "#292D34"
+
+DEFAULT_BACKGROUND_COLOR = (
+    DEFAULT_BACKGROUND_COLOR_DARK
+    if theme.get("base") == "dark"
+    else DEFAULT_BACKGROUND_COLOR_LIGHT
+)
+DEFAULT_BORDER_COLOR = (
+    DEFAULT_BORDER_COLOR_DARK
+    if theme.get("base") == "dark"
+    else DEFAULT_BORDER_COLOR_LIGHT
+)
+
+
 @extra
 def style_metric_cards(
-    background_color: str = "#FFF",
+    background_color: str = DEFAULT_BACKGROUND_COLOR,
     border_size_px: int = 1,
-    border_color: str = "#CCC",
+    border_color: str = DEFAULT_BORDER_COLOR,
     border_radius_px: int = 5,
     border_left_color: str = "#9AD8E1",
     box_shadow: bool = True,
@@ -24,13 +44,6 @@ def style_metric_cards(
         box_shadow (bool, optional): Whether a box shadow is applied. Defaults to True.
     """
 
-    theme = st_theme()
-
-    # When dark mode, convert background and border to be dark
-    if theme.get("base") == "dark":
-        background_color = "#1B1C24"
-        border_color = "#292D34"
-
     box_shadow_str = (
         "box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15) !important;"
         if box_shadow