diff --git a/src/wireviz/DataClasses.py b/src/wireviz/DataClasses.py
index 87f9a6b..6da26b6 100644
--- a/src/wireviz/DataClasses.py
+++ b/src/wireviz/DataClasses.py
@@ -42,11 +42,15 @@ class Look:
     fontname: Optional[PlainText] = None
     fontsize: Optional[Points] = None
 
+    def lookdict(self) -> dict:
+        """Return Look attributes as dict."""
+        return {k:v for k,v in asdict(self).items() if k in asdict(DEFAULT_LOOK).keys()}
+
     def _2dict(self) -> dict:
         """Return dict of non-None strings with color values translated to hex."""
         return {
             k:translate_color(v, "hex") if 'color' in k else str(v)
-            for k,v in asdict(self).items() if v is not None
+            for k,v in self.lookdict().items() if v is not None
         }
 
     def graph_args(self) -> dict:
@@ -78,8 +82,7 @@ DEFAULT_LOOK = Look(
 
 
 @dataclass
-class Options:
-    base: Look = field(default_factory=dict)
+class Options(Look):
     node: Look = field(default_factory=dict)
     connector: Look = field(default_factory=dict)
     cable: Look = field(default_factory=dict)
@@ -89,8 +92,7 @@ class Options:
 
     def __post_init__(self):
         # Build initialization dicts with default values followed by dict entries from YAML input.
-        self.base = Look(**{**asdict(DEFAULT_LOOK), **self.base})
-        self.node = Look(**{**asdict(self.base), **self.node})
+        self.node = Look(**{**self.lookdict(), **self.node})
         self.connector = Look(**{**asdict(self.node), **self.connector})
         self.cable = Look(**{**asdict(self.node), **self.cable})
         self.bundle = Look(**{**asdict(self.cable), **self.bundle})
diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index 9002dd9..4812986 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -98,15 +98,15 @@ class Harness:
         dot.attr('graph', rankdir='LR',
                  ranksep='2',
                  nodesep='0.33',
-                 **self.options.base.graph_args())
+                 **self.options.graph_args())
         dot.attr('node', shape='none',
                  style='filled',
                  width='0', height='0', margin='0',  # Actual size of the node is entirely determined by the label.
                  **self.options.node.node_args())
         dot.attr('edge', style='bold',
-                 **self.options.base.node_args())
+                 **self.options.node_args())
 
-        wire_border_hex = wv_colors.get_color_hex(self.options.base.bordercolor)[0]
+        wire_border_hex = wv_colors.get_color_hex(self.options.bordercolor)[0]
 
         # prepare ports on connectors depending on which side they will connect
         for _, cable in self.cables.items():
diff --git a/src/wireviz/wireviz.py b/src/wireviz/wireviz.py
index 9567494..2716169 100755
--- a/src/wireviz/wireviz.py
+++ b/src/wireviz/wireviz.py
@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 
 import argparse
+from dataclasses import asdict
 import os
 from pathlib import Path
 import sys
@@ -13,7 +14,7 @@ if __name__ == '__main__':
     sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
 
 from wireviz import __version__
-from wireviz.DataClasses import Metadata, Options, Tweak
+from wireviz.DataClasses import DEFAULT_LOOK, Metadata, Options, Tweak
 from wireviz.Harness import Harness
 from wireviz.wv_helper import expand, open_file_read
 
@@ -37,7 +38,7 @@ def parse(yaml_input: str, file_out: (str, Path) = None, return_types: (None, st
 
     harness = Harness(
         metadata = Metadata(**yaml_data.get('metadata', {})),
-        options = Options(**yaml_data.get('options', {})),
+        options = Options(**asdict(DEFAULT_LOOK), **yaml_data.get('options', {})),
         tweak = Tweak(**yaml_data.get('tweak', {})),
     )
     if 'title' not in harness.metadata:
diff --git a/src/wireviz/wv_html.py b/src/wireviz/wv_html.py
index 287e613..d05ccfa 100644
--- a/src/wireviz/wv_html.py
+++ b/src/wireviz/wv_html.py
@@ -15,7 +15,7 @@ def generate_html_output(filename: Union[str, Path], bom_list: List[List[str]],
         file.write(' <meta charset="UTF-8">\n')
         file.write(f' <meta name="generator" content="{APP_NAME} {__version__} - {APP_URL}">\n')
         file.write(f' <title>{metadata["title"]}</title>\n')
-        file.write(f'</head><body style="{options.base.html_style()}">\n')
+        file.write(f'</head><body style="{options.html_style()}">\n')
         file.write(f'<h1>{metadata["title"]}</h1>\n')
         description = metadata.get('description')
         if description:
@@ -31,7 +31,7 @@ def generate_html_output(filename: Union[str, Path], bom_list: List[List[str]],
 
         file.write('<h2>Bill of Materials</h2>\n')
         listy = flatten2d(bom_list)
-        border = options.base.html_style(color_prefix="border: 1px solid", include_all=False)
+        border = options.html_style(color_prefix="border: 1px solid", include_all=False)
         file.write(f'<table style="{border} border-spacing: 0px;">\n')
         file.write(' <tr>\n')
         for item in listy[0]: