Casa Blanca vs Sea Mariner
Both are Sherwin-Williams colors. Hue-wise, Casa Blanca belongs to the beige family and Sea Mariner to the blue-grey family. At LRV 76 vs 7, Casa Blanca will read as the brighter of the two — a 70-point gap that matters most in north-facing or low-light rooms. The tonal difference — Casa Blanca's warm character against Sea Mariner's cool — becomes most visible against white trim or in morning light. At ΔE 61.4, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Casa Blanca vs Sea Mariner in Real Spaces
1 real room side by side. Seeing Casa Blanca and Sea Mariner in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The LRV gap is large enough that Casa Blanca will make the room feel meaningfully brighter than Sea Mariner would.
Color Details
Casa Blanca vs Sea Mariner Simulated Comparison
5 simulated room previews — drag the slider on each to see Casa Blanca on one side and Sea Mariner on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Casa Blanca comparisons
See how Casa Blanca stacks up against other well-photographed colors across different brands and tones.
