Sunlight will break down the product in a relatively short period. The exact time for this will vary depending on the strength of the UV light. Even under weak UV, the dyes will break down in a matter of days.
The colour of all dyes will disappear if the solution is mixed with chlorine. Add approximately 4 grams of 12% bleach for every gram of product in the solution. Adding water will also dilute dye concentration and reduce coloration, or even eliminate colour all together depending on volume of water added.