A Gray Quartz Undermount Sink That Grounds a Vanity Design

The Karran Q-306-GR is a single-bowl oval quartz vanity sink in gray that installs under the countertop for a clean, rimless look at the vanity surface. Its compact footprint suits bathrooms where the counter and the color scheme do the talking.

Key Features

• Gray quartz composite body that integrates with neutral and earth-toned vanity palettes.
• Undermount installation into laminate or solid surface countertops for a seamless countertop-to-bowl transition.
• Single oval bowl with a 17-inch interior length and 5-1/2-inch depth for everyday handwashing and grooming tasks.
• Requires a minimum 21-inch cabinet width for proper fit and installation.
• cUPC certified quartz composite construction.

Where Gray Works in a Vanity

Gray sits between warm and cool tones, which makes this sink a natural fit in bathrooms built around white, charcoal, greige, or wood-tone vanity cabinets. An undermount install keeps the countertop surface unbroken across its full width, so the gray bowl reads as part of the counter rather than an interruption of it. That continuity is especially useful in smaller bathrooms where a visible rim can make the vanity feel busier than it is.

Quartz Composite Material and Finish

The Q-306-GR is built from quartz composite, an engineered material that delivers the weight and solidity of stone in a consistent, through-body gray color. The oval bowl shape keeps the profile soft, and the undermount design means the counter edge meets the bowl directly with no rim above the surface. This sink is designed for undermount installation into laminate or solid surface countertops specifically, so the countertop material should be confirmed before the order is placed.

The Right Fit for This Sink

This sink suits a primary or secondary bathroom vanity where a single bowl is all that is needed and the design intent calls for a muted, neutral tone rather than a stark white or a bold statement color. Designers specifying a transitional or contemporary bath will find gray an easy coordinate with both light and dark cabinet finishes. The 19-inch overall width and 21-inch minimum cabinet requirement make it a practical choice for standard vanity cabinets without demanding extra-wide base units. Because it is not ADA compliant as rated, it is best suited for standard vanity applications rather than accessible design projects.

Common Questions

A Neutral Tone That Stays Out of the Way

Choose the Q-306-GR when the vanity design calls for a quartz sink that coordinates quietly with the room rather than competing with it, installed cleanly beneath the countertop surface.