Sea Glass
What Sea Glass Actually Looks Like
Sea Glass CSP-735 sits in that interesting middle ground where blue, green, and gray all compete for attention. In most rooms it reads as a moody, misty blue-gray with a green undercurrent. It has real depth without being a true dark color, and it carries a slightly stormy quality that keeps it from feeling cheerful or beachy in the typical sense.
Sea Glass Undertones
The undertone here is genuinely slippery. The base is a blue-green gray, but which direction it leans depends entirely on what surrounds it. Put it next to something greener and it pulls blue. Put it next to something bluer and it pulls green. In strong natural light, both the blue and green can flash in the same room at different times of day. Blue tends to show up more than green overall, but you should expect both. That chameleon quality is the defining trait of this color, and you need to plan your palette around it rather than assume it will stay fixed.
Where Sea Glass Works Best
South-facing rooms with plenty of natural light are where this color performs best. The light keeps it from tipping heavy, and you get to enjoy the full range of its shifting undertones throughout the day. In rooms with limited natural light or small square footage, it can make the space feel cozier and more enclosed. That is not always a problem, but if you also have medium to dark hardwood floors, the combination can feel weighty and closed in. Light off-white flooring or white oak hardwood works much better with it. For kitchens, it is worth considering on an island or a partial wall rather than full cabinet coverage if you want something that reads timeless beyond a coastal context. It is not well suited to exteriors, where it tends to clash with common stone, brick, and roofing materials.
Where to put Sea Glass
In a living room with good south or west light, Sea Glass reads as a composed, atmospheric blue-green-gray that shifts through the day. Keep trim in a clean or slightly warm white, and choose seating and textiles in natural linens or soft warm neutrals to prevent the room from feeling cold.
It works well on a kitchen island or as a wall color in a coastal or transitional kitchen. On full cabinetry it leans stormy and moody rather than bright, so be sure you want that direction before committing. White oak shelving or open shelves in a warm natural wood pair well without the heaviness that darker floors can create.
The depth and misty quality of Sea Glass make it a good bedroom choice when you want something calming but not bland. In a bedroom with average or better natural light it stays readable. In a room that gets mostly artificial light, expect it to read more as a flat blue-gray.
A bathroom with natural light lets Sea Glass do its best work, bringing out the shifting blue-green character. In a windowless or very small bathroom, the mid-range depth can feel heavy. A bright white trim and light tile keep it grounded without making the space feel smaller than it is.
What to Pair With Sea Glass
Sea Glass pairs cleanly with white trims. Chantilly Lace OC-65, Simply White OC-117, and White Dove OC-17 all work well, each landing at a slightly different warmth level against the blue-green-gray wall. For a monochromatic approach, it coordinates with other dark blue-gray-green blends. It also sits comfortably next to greens that carry similar gray content, like Paris Rain and Vale Mist, and beside soft warm grays like Revere Pewter and Colonnade Gray. One thing to avoid: cherry wood. Sea Glass pulls out the red undertones in cherry and the combination reads as a color mistake rather than a contrast.
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Colors that clash with Sea Glass
Sea Glass pulls red undertones out of cherry wood and the pairing reads as unintentional rather than contrasting.
In a room that already lacks natural light, combining Sea Glass walls with dark floors creates a heavy, enclosed feeling that can be hard to reverse with lighting alone.
Sea Glass is an interior color and tends to conflict with the most common exterior materials including typical stone, brick, and roofing shingles.
Common questions
The Benjamin Moore color code is CSP-735. The LRV is 33.29, which puts it solidly in the mid-range depth. The hex and RGB values are displayed in the color spec block above.
It can, but north light will push the blue side of the undertone harder and flatten the green. In a small north-facing room it can read quite dark and cool. If you go that route, use bright white trim, maximize artificial warm lighting, and keep large furnishings light in tone.
Chantilly Lace OC-65, Simply White OC-117, and White Dove OC-17 are all solid choices. Chantilly Lace gives the crispest contrast. White Dove adds a touch of warmth that softens the blue-gray quality of the wall. Simply White lands in between.
It works on kitchen cabinets if you want a stormy, coastal-leaning look rather than something light and airy. For a more versatile result, consider using it on just the island or lower cabinets with lighter uppers. That approach lets you live with the color without committing the entire kitchen to a moody palette.
Mount Saint Anne is darker and leans more blue. Silver Marlin is lighter and leans more green. Wedgewood Gray is at a similar depth but pulls more reliably blue where Sea Glass shifts depending on context. Quiet Moments is significantly lighter and reads as a soft, airy version of the same color family.