fix: re-add first color as black (#584)

* fix: re-add first color as black

* fix: adjust font size in dune.py and update .gitignore for generated files

* test: update baseline

Author: jonas-eschle

.gitignore

@@ -116,3 +116,4 @@ venv.bak/
 .idea/
 /docs/source/_generated/
 /tmp/
+/docs/source/_static/_generated/

src/mplhep/styles/dune.py

@@ -33,7 +33,7 @@
     "figure.autolayout": True,
     # Text properties
     "text.hinting_factor": 8,
-    "font.size": 24,
+    "font.size": 22,
     # Axes properties
     "axes.facecolor": "white",
     "axes.edgecolor": "black",
@@ -51,6 +51,7 @@
     "axes.prop_cycle": cycler(
         "color",
         [
+            "#000000",  # Black
             "#D55E00",  # DUNE Orange (primary)
             "#56B4E9",  # DUNE Sky Blue (primary)
             "#E69F00",  # DUNE Yellow/Gold (primary)