Auto-fill color dropdown

I am trying to get my dropdowns to auto-fill with yellow when someone chooses "N" or No but do not like the harsh generic yellow.  I have tried to research how to enter one of the other colors by using their RGB on a 0-1 scale.  My question is where would I need to insert the RGB in my current script:

event.target.fillColor=(this.getField("Dropdown35").valueAsString=="N")? color.yellow:color.transparent;

And how should I enter it? All the forums I have read have =["RGB",value,value,value] 

Thank you!