Last updated: October 27, 2026
SW 7615 Sea Serpent is a dark, muted navy blue from Sherwin-Williams, with a charcoal-gray cast and an LRV of about 7. It reads as a deep, moody navy indoors and a brighter blue outside, so test it on your own wall before you commit.
Key Takeaways
- SW 7615 Sea Serpent is a dark muted navy, not a bright teal, with a charcoal-gray cast.
- Its LRV is about 7, so it is very dark and can read nearly black in weak light.
- The undertone is debated: sources describe it as gray, as navy with a faint green hint, or as charcoal gray with a hint of deep green.
- It works on interiors — walls, cabinets, doors, trim — and on exteriors, where it looks brighter.
- Pair it with Greek Villa (SW 7551) or Pure White (SW 7005) trim, and sample it first.
What Color Is SW 7615 Sea Serpent?
SW 7615 Sea Serpent is a dark, muted navy blue from Sherwin-Williams, part of the brand’s neutrals collection. Its hex code is #3E4B54, and its RGB values are 62, 75, and 84. It is a navy pulled down by gray, so it feels calm and heavy rather than loud — not a bright navy, and not a saturated blue. Judge it from a real paint sample, not from a photo, because on a screen it can look bluer or grayer than it does on a wall.
Is Sea Serpent Teal or Navy?
Sea Serpent is a navy, not a teal. The confusion is understandable, because some descriptions call it a deep teal. That label is loose and misleading if you take it literally.
Teal is a green-blue with a clear green presence. Sea Serpent is a muted navy with a gray cast. A faint green hint can show in some light, but green is a whisper in this color, not its main note. If you want a dark navy that stays soft and smoky instead of electric, Sea Serpent is the right kind of color.
What Is the Undertone?
The undertone of Sea Serpent is where sources disagree, and the honest answer is to say so. One review calls the undertone gray, a color consultant describes it as navy blue with slight green undertones, and another calls it dark navy muted with charcoal gray and a hint of deep green. Put together, the fairest wording is this: muted navy with a gray cast; a faint green hint can show in some light. No single source’s wording is the only truth, and a room’s light can push the color toward gray on one wall and toward green on another, so sample it in the room you plan to paint, on the actual wall, and look at it morning and evening before you decide.
How Dark Is Sea Serpent?
Sea Serpent is very dark. Its LRV is about 7, with Samplize listing 6.7%. On the 0-to-100 light reflectance scale, that puts it near the bottom, close to the darkest paint colors.
That darkness is the color’s whole character. On a large wall it creates depth and drama, and it makes white trim and light furniture stand out. In weak light, Sea Serpent can read nearly black, so if the room gets little natural light, either accept the near-black mood or choose a lighter navy.
How Does It Compare to Other Dark Navies?
Sea Serpent sits in a small family of dark Sherwin-Williams navies, and the differences between them are small but real.
| Color | Brand/Code | LRV | Undertone | Source |
|---|---|---|---|---|
| Sea Serpent | Sherwin-Williams SW 7615 | ~7 | Gray cast, faint green hint | Samplize |
| Naval | Sherwin-Williams SW 6244 | 4 | Navy with a green-gray undertone | The Color Concierge |
| Cyberspace | Sherwin-Williams SW 7076 | 6 | Charcoal navy, gray undertone | Samplize |
| Indigo Batik | Sherwin-Williams SW 7602 | 8 | Deep indigo navy | Blacksburg Belle |
Naval is darker still and a little greener. Cyberspace is close in depth but reads more charcoal. Indigo Batik is a touch lighter and more purely blue.
Where Does Sea Serpent Work Best?
Sea Serpent works best where its darkness can be a feature rather than a problem: rooms with good light, rooms you want to feel cozy and enclosed, and surfaces where a dark color adds contrast.
Good interior uses include:
- An accent wall behind a bed, a sofa, or a dining table.
- Kitchen or bathroom cabinets, where the dark navy grounds white counters and brass hardware.
- Interior doors and trim, for a bold frame around a lighter room.
- A home office or library, where the moody color suits long hours and bookshelves.
- A powder room, where a small dark space feels intentional rather than cramped.
Sea Serpent on an Exterior
It also works on exteriors. A color consultant notes that Sea Serpent looks much brighter outside than on a screen or on the fan deck, and it is a client favorite for exteriors, especially with red brick or warm stone. Sunlight lifts the blue out of it, so the house reads as a deep navy rather than a near-black.
Sample it on the siding first — a color that shifts this much between indoor light, outdoor light, and screen is not one to choose from a chip alone.
What Trim Colors Go With Sea Serpent?
Samplize recommends Greek Villa (SW 7551) or Pure White (SW 7005) as trim colors for Sea Serpent, and both work: the white edge makes the navy look intentional and keeps the room from feeling closed in.
For a coastal palette, Sea Serpent pairs with Sea Salt for drama and contrast: the pale, green-gray Sea Salt lightens the scheme while the navy anchors it.
Guides on Activemyhouse follow the same rule for dark paint colors: pick one bold color, pair it with a clean white trim, and let the room’s light do the rest.
How to Sample Sea Serpent Before You Paint
Sampling matters more for Sea Serpent than for most colors, because it shifts so much with light. Follow these steps:
- Order a peel-and-stick sample, such as a Samplize sample, which uses two coats of real paint in a satin finish.
- Stick it on the wall you plan to paint, not on a different wall in a different room.
- Look at it in the morning, at midday, and in the evening, with the room’s lights on and off.
- Check it next to your trim, your flooring, and any fixed feature like brick or stone.
- If the sample reads nearly black in your room, decide whether that is the mood you want before you buy the paint.
Frequently Asked Questions
Is SW 7615 Sea Serpent teal or navy?
Sea Serpent is a muted navy, not a teal. Some descriptions loosely call it a deep teal, but its main note is navy with a gray cast, and any green is only a faint hint in some light.
How dark is Sea Serpent?
It is very dark, with an LRV of about 7. In weak light it can read nearly black, so it suits rooms with good light or spaces where a moody, enclosed feeling is the goal.
What is the undertone of Sea Serpent?
Sources disagree slightly: one calls the undertone gray, another navy with a slight green hint, and another charcoal gray with a hint of deep green. The honest summary is muted navy with a gray cast and a faint green hint in some light.
What trim color goes with Sea Serpent?
Greek Villa (SW 7551) or Pure White (SW 7005) are the recommended trim colors. Both are warm whites that frame the dark navy cleanly and keep the room from feeling closed in.
Can you use Sea Serpent on the exterior of a house?
Yes. It looks brighter outside than on a screen or fan deck, and it is a favorite for exteriors, especially with red brick or warm stone. Sample it on the siding first, since it shifts with the light.
Is Sea Serpent a good color for cabinets?
Yes, it works well on kitchen or bathroom cabinets, where the dark navy grounds white counters and light hardware.
Conclusion
SW 7615 Sea Serpent is a dark, muted navy for people who want drama without brightness: deep enough to read nearly black in weak light, soft enough to stay smoky rather than electric. If you sample it on your own wall, pair it with a warm white trim, and accept its near-black mood, sw 7615 sea serpent will reward you with a room that feels grounded, calm, and finished.