asp.net checkboxlist change only part of background color

I have a form that onload is taking a datareader and binding to a checkboxlist. The output will look like the following.

Product1 (Store1)
Product2 (Store1)
Product3 ( )
Product4 (Store2)
Product5 (Store1)
Product6 ( )

I am wondering if there is a way I can make the ( ) section only filled with a color. In classic asp we could say if Instr '( )' then
<b style='background-color:yellow;'> </b>
end if
Note, I really do not want to color it if a value (Store1) is present. Just makes it easier to read.

Any ideas?

my code is something like so:

VB Code:

Dim conPubs as SqlConnection
Dim cmdProducts as SqlCommand
Dim dtrAddProducts as SqlDataReader
 
conPubs = New SqlConnection(System.Config.....("CONN"))
cmdProducts = New SqlCommand("SELECT fullmodel, product_id FROM table", conPubs)
 
conPubs.Open()
dtrAddProducts = cmdProducts.ExecuteReader()
chkProducts.DataSource = dtrAllProducts
chkProducts.DataTextField = "fullmodel"
chkProducts.DataValueField = "product_id"
chkProducts.DataBind()
dtrAddProducts.Close()

form section

Code:

---

...
<td>
<asp:checkboxlist id="chkProducts" runat="Server" textalignment="left"></asp:checkboxlist>
</td>
...

---