Background color of the cards on Dashboard

I would like to see the implementation of this idea in Asana

For example one card will be green color - its Family, red - its business, yellow - hobby cards.

this will help to see and classify areas of activity.

Welcome to the Asana Community Forum @Ильнур!

You could add a custom field with drop-down and each of the options has a different colour. This way you can customize them a bit and you can see the colours or even filter to only see specific ones.

Additionally here is an existing feedback request thread around colours:

And since you mention dashboards, for charts this is how you can colour-code them:

Does that help?