Proline Decorative Concrete Systems AC-717 1 gal Buckskin EZ-Accent Water-Based Acrylic Stain. Proline Duracolor EZ-Accent is a water based acrylic stain that is specially formulated to accent any decorative concrete surface. It is a translucent stain that is designed to blend with the base color over which it is applied. EZ-ACCENT is quickly and easily applied to decorative concrete fl artwork, vertical surfaces and rockscapes for accent colors and natural-looking variations. There are 18 standard EZ-ACCENT colors, but any of the 18 colors can be mixed together for customized, varying results.