You can easily assign all light or dark standard colors to an artwork variation within the artwork page.
To Assign Light and Dark Standard Colors to an Artwork:
1) Click on Artwork on the left-hand menu and then click the edit button of an artwork with multiple color variations.
2) Next to the artwork variations, click on +SELECT COLORS.
3) On the top of the Standard Color Selection pop-up box, you can click on Check All Light or Check All Dark.
That’s it! Your artwork will now reflect the appropriate artwork for light or dark standard colors.