Dark colors

src/streamlit_extras/metric_cards/__init__.py

@@ -1,7 +1,7 @@
 import streamlit as st
 
 from streamlit_extras import extra
-
+from streamlit_extras.theme import st_theme
 
 @extra
 def style_metric_cards(
@@ -24,6 +24,13 @@ 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