Coastal
Open in tool →Sea-teal, sky and sand — bright without shouting; works for travel, wellness, and anything near water.
Color
#3c9f8d
#3c9f8d
hex
#3c9f8drgb
rgb(60, 159, 141)hsl
hsl(169, 45%, 43%)oklch
oklch(0.64 0.096 178.9)Closest name: Baltic (#279d9f)Relative luminance 0.2768
Colors that go with #3c9f8d
Charcoal, Copper and Crimson lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3c9f8d: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
shippedDesigners have shipped Copper with #3c9f8d: 6 real palettes, including Clean Beauty and Wellness, as the accent.
Crimson #dc143c
shippedCrimson is paired with #3c9f8d in 7 real palettes, including Diner and DuckDuckGo's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3c9f8d: 7 real palettes, including Peacock and Intel's brand system, as the supporting colour.
Midnight Blue #191970
shipped8 real palettes, including Tide Pool and Fintech Trust put Midnight Blue beside #3c9f8d, as that palette's text colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3c9f8d in 7 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #3c9f8d: 4 real palettes, including Fintech Trust and Olympics's brand system, as the supporting colour.
Deep Pink #ff1493
complementaryDeep Pink sits directly opposite #3c9f8d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #3c9f8d
Tints & shades
Harmonies
Contrast
| #3c9f8d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.21:1 | fail | pass | fail | |
Aaon black | 6.54:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3c9f8d as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #3c9f8d
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #3c9f8d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3c9f8d-a2bebc-d459ab-1f2a2d-e9f1ec?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md