<human>: How would someone go about accomplishing this goal?
how to brighten curtain color

OPTIONS:
- add ⅓ cup salt to your laundry detergent to brighten the colours.
- add ⅓ cup salt to your laundry bluing and fabric softener to brighten the colours.
<bot>: add ⅓ cup salt to your laundry detergent to brighten the colours.