In the long press menu, add an option to add the selected colour to a wishlist, which can be accessed via the navigation drawer. When viewing the wishlist, typically the user will not already have any of the colours, however it would be helpful to still show the colours to preview them. Tapping the colour should add it to "my colours" and remove it from the wishlist. Users should also be able to remove colours from the wishlist without adding them to "my colours". Perhaps use toasts to notify the user of actions which remove colours from the wishlist.
In the long press menu, add an option to add the selected colour to a wishlist, which can be accessed via the navigation drawer. When viewing the wishlist, typically the user will not already have any of the colours, however it would be helpful to still show the colours to preview them. Tapping the colour should add it to "my colours" and remove it from the wishlist. Users should also be able to remove colours from the wishlist without adding them to "my colours". Perhaps use toasts to notify the user of actions which remove colours from the wishlist.