Do you advertise all of your color variants, or just one?

For Amazon PPC campaigns, are there upsides/downsides to advertising multiple variants in the same PPC campaign?

For example, we only sell one product but we sell it in 4 colors: black, blue, white, pink. There is a heavy preference toward the black version with 90% of our sales being that color. All four colors run on the same ad campaign.

Should I remove the other variants from the campaign?