Can you wash lights and darks together?

Colour alone does not decide every load. A stable, previously washed dark item can be a different decision from a new dark garment placed with a white or very light item.

The checker is a planning aid, not a replacement for the label on the individual item. When a label is more restrictive than a general pattern, use the label and separate the item if needed.

High-value, light, or delicate pieces may justify a separate load even when the checker finds no hard conflict. Convenience-first grouping should still leave the visible warning in place.

Unknown information is a reason to slow down rather than a reason to invent certainty. Confirm the fabric, colourfastness, or care limit when the item is valuable or the consequence of a mistake is high.

Add the items, select the risk mode that matches the consequence you want to avoid, and use the result as a transparent trade-off rather than an automatic permission.

Use a smaller first load when you are unsure, then save a known-good routine locally after you have checked the actual labels. That keeps future planning quick without making a blanket claim about every item.