Filter report by back ground color or by condition

I'd like to filter my report by conditions like iif(Parameter is true, Fields.speed.value > 100 or Fields.speed.value > (speedlimit +15), nothing).  I tried using Dataset filter as following set up, but it won't return the order with speed over 100 or over speedlimit by 15 km/h.   

FilterExpression: [Speed]

>

=iif((Parameter.Boolean.value = true, 100 or (fields.Speedlimit.value +15), 0).

Then i filter all the cell that when speed is under the condition like

iif(speed > 100 or speed > (speedlimit+15), "PINK", "White")

but I don't know whether I could filter report by back ground color.

Anyone please help me with any solution. 

thanks.