No. A filled-in background means the field is disabled. Why are people hell-bent on trying to fix something that works? Everyone knows how text boxes work already; they don't need to be improved. Same color as the background means editable, different color means disabled.

I would say that specifically white means editable. Not just "same as background".

>Same color as the background means editable, different color means disabled.

I disagree, and further, have never heard this.