Changing the layer colour in Isolation Mode

Question

How do I change the layer colour once I'm in Isolation Mode? I'm using CS4 and tring to edit a yellow object but Illustrator has made the layer/paths/edges yellow making it VERY difficult to see what I'm doing?
...actually, I just changed the objects layer to a differrent colour which seems to have made Illustator select the next colour down when in Isolation made.
Is this my only option?

Answer 1

I decided to test this more thoroughly.
Elements edited in Isolation Mode do actually inherit the color of the parent layer.
But there seems to be an exception: symbols. No matter what color the layer is, symbols edited in Isolation Mode get their own color. And that color is persistent across all symbols, regardless of the layer that they appear on.
However, that color is not consistent throughout the lifespan of the document. The color changes according to a pattern.
And the pattern is this: there is a sequential list of layer colors in AI, and a correlation  between the number of layers in your document and the sequential number of the colors in the Layer Options color list. Symbols always use the color that is next in the list of layer colors, following the pre-assigned color of the most recently-created layer.
Test this out if you want:
Create a new document. Note that the default layer always uses the "light blue" layer color.
Now create a second layer in that document. It will be red.
The third layer will be green, and the fourth will be blue.
Now make a symbol and edit it in Isolation Mode. It's yellow.
Now look at the sequence of colors in the layer color dropdown menu: "yellow" is fifth in the list, after "blue," the fourth color in the list. It seems like AI is creating a new temporary layer for editing symbols, and like other layers, it is automatically assigned a color.
So basically, symbols edited in Isolation Mode will only be yellow if you have four layers. The way that AI assigns colors to symbols being edited in  Isolation Mode seems to depend on the number of layers in the document.
If you followed the steps above, you can test this out by creating a fifth layer. Notice that it automatically gets assigned a layer color of yellow. Edited symbols will be magenta... the sixth color in the list.
It doesn't matter if you change the colors of each layer after creating  them; as far as I can tell, if you have four layers, symbols edited in Isolation Mode will always be yellow.
The workaround would be to add a fifth layer to your document. Symbols in Isolation Mode will then show up in magenta, which is much easier to see on a white background.