diff --git a/MANIFEST.in b/MANIFEST.in
index 2b323f506b..30674bfe2c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -8,6 +8,7 @@ include panel/index.ts
 include panel/layout/*.html
 include panel/models/*.ts
 include panel/models/vtk/*.ts
+include panel/_templates/*.css
 include panel/_templates/*.js
 include panel/_templates/*.html
 include panel/tests/test_data/*.png
diff --git a/panel/_templates/jupyter.css b/panel/_templates/jupyter.css
new file mode 100644
index 0000000000..61e5e21014
--- /dev/null
+++ b/panel/_templates/jupyter.css
@@ -0,0 +1,5 @@
+.bk-root, .bk-root .bk:before, .bk-root .bk:after {
+  font-family: var(--jp-ui-font-size1);
+  font-size: var(--jp-ui-font-size1);
+  color: var(--jp-ui-font-color1);
+}
diff --git a/panel/io/notebook.py b/panel/io/notebook.py
index 5bbdd57f92..850f7576fc 100644
--- a/panel/io/notebook.py
+++ b/panel/io/notebook.py
@@ -36,7 +36,7 @@
 from ..compiler import require_components
 from .embed import embed_state
 from .model import add_to_doc, diff
-from .resources import Bundle, Resources, _env, bundle_resources
+from .resources import PANEL_DIR, Bundle, Resources, _env, bundle_resources
 from .server import _server_url, _origin_url, get_server
 from .state import state
 
@@ -260,8 +260,10 @@ def load_notebook(inline=True, load_timeout=5000):
     bokeh.io.notebook.curstate().output_notebook()
 
     # Publish comm manager
+    CSS = (PANEL_DIR / '_templates' / 'jupyter.css').read_text()
     JS = '\n'.join([PYVIZ_PROXY, _JupyterCommManager.js_manager, nb_mime_js])
     publish_display_data(data={LOAD_MIME: JS, 'application/javascript': JS})
+    publish_display_data(data={'text/html': f'<style>{CSS}</style>'})
 
 
 def show_server(panel, notebook_url, port):