Update selections.md

Author: LiamConnors

doc/python/selections.md

@@ -84,7 +84,7 @@ fig.show()
 
 ## Fill Color for Active Selections
 
-You can style active selections with `activeselection`. In this example, we set active selections to appear with a `fillcolor` of `blue`.
+You can style the active selection with `activeselection`. A selection is active when it is selected or created. In this example, we set active selections to appear with a `fillcolor` of `yellow`.
 
 ```python
 import plotly.express as px
@@ -95,7 +95,7 @@ fig = px.scatter(df, x="sepal_width", y="sepal_length")
 fig.add_selection(type="rect", x0=3.0, y0=6.5, x1=3.5, y1=5.5)
 
 fig.update_layout(dragmode='select',
-                  activeselection=dict(fillcolor='blue'))
+                  activeselection=dict(fillcolor='yellow'))
 
 fig.show()
 ```