Color

#2b2f31

#2b2f31
hex#2b2f31
rgbrgb(43, 47, 49)
hslhsl(200, 7%, 18%)
oklchoklch(0.302 0.007 229.1)
Closest name: Carbon Fibre (#2e2e2e)Relative luminance 0.0277

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#312d2b

#2b3130 · #2b2c31

#312b2f · #2f312b

Split-complementary

Open in tool →

#312b2c · #31302b

#302b31 · #312d2b · #2c312b

Contrast

#2b2f31 as textRatioAAAA largeAAAFix
Aaon white
13.52:1passpasspassPasses AAA — no fix needed.
Aaon black
1.55:1failfailfail
  • AA: use #6d787e as the text (4.64:1)
  • AAA: use #8f999e as the text (7.22:1)
  • AA: or shift the background to #969696 (4.57:1)
  • AAA: or shift the background to #bdbdbd (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2b2f31 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2b2f31 reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b2f31
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #2b2f31 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b2f31-a2beb0-c859d4-1f2d2b-eaf1e9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md