Stone
Open in tool →Stone greys with a faint warmth — Tailwind's stone scale used as a whole palette: interfaces that want to disappear.
Color
#3f3d37
#3f3d37
hex
#3f3d37rgb
rgb(63, 61, 55)hsl
hsl(45, 7%, 23%)oklch
oklch(0.36 0.01 91.6)Closest name: Black Olive (#3b3c36)Relative luminance 0.0467
Colors that go with #3f3d37
Amber, Blue and Blush Pink 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.
Amber #ffbf00
shippedAmber is paired with #3f3d37 in 4 real palettes, including McDonald's's brand system and Beach Hut, as the lead colour.
Blue #0000ff
shipped11 real palettes, including Dunkin''s brand system and Jeep's brand system put Blue beside #3f3d37, as the supporting colour.
Blush Pink #e8b4b8
shipped5 real palettes, including Garden Wedding and Nursery put Blush Pink beside #3f3d37, as the supporting colour.
Burlywood #deb887
shippedBurlywood is paired with #3f3d37 in 5 real palettes, including Polaroid and Chalkboard, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3f3d37: 6 real palettes, including Clean Beauty and Paper & Pine, as the lead colour.
Champagne #f7e7ce
shipped4 real palettes, including Sweetgreen's brand system and Darkroom put Champagne beside #3f3d37, as the supporting colour.
Chocolate #d2691e
shippedChocolate shows up next to #3f3d37 in 4 real palettes, including Homestead and Wellness, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the near-white surface #3f3d37 was made for — maximum legibility with no colour cast to argue with.
Real palettes that use #3f3d37
Tints & shades
Harmonies
Contrast
| #3f3d37 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.86:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.93:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f3d37 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
Fonts for this mood
#3f3d37 reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #3f3d37
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 #3f3d37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3f3d37-a2beb0-c859d4-1f2d2b-eaf1e9?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