Use color names as display color

In the display mode showing all available rods, it is now attempted to use the color given by the rod class.
If matplotlib does not support a color name, a different color is chosen.

RodTracker/src/RodTracker/ui/rodimagewidget.py

@@ -1302,10 +1302,20 @@ def extract_rods(self, data: pd.DataFrame, color: str) -> None:
             ident.setObjectName(f"rn_{no}_{rod_color}")
             ident.seen = seen
             if len(colors_present) > 1:
-                color_idx = np.where(colors_present == rod_color)[0][0]
-                ident._rod_color = QtGui.QColor.fromRgbF(
-                    *_colors[color_idx]
-                ).getRgb()[:-1]
+                try:
+                    rgb_color = QtGui.QColor.fromRgbF(
+                        *mpl.colors.to_rgba(rod_color, alpha=1.0)
+                    ).getRgb()[:-1]
+                except ValueError as e:
+                    _logger.warning(
+                        f"Unknown color for 2D display!\n{e.args}\n"
+                        f"Using a different color instead."
+                    )
+                    color_idx = np.where(colors_present == rod_color)[0][0]
+                    rgb_color = QtGui.QColor.fromRgbF(
+                        *_colors[color_idx]
+                    ).getRgb()[:-1]
+                ident._rod_color = rgb_color
                 # Rods should not be interactable if all are displayed
                 ident.setDisabled(True)
             new_rods.append(ident)