Color

#312b2b

#312b2b
hex#312b2b
rgbrgb(49, 43, 43)
hslhsl(0, 7%, 18%)
oklchoklch(0.296 0.009 17.7)
Closest name: Carbon Fibre (#2e2e2e)Relative luminance 0.0256

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2b3131

#312b2e · #312e2b

#2b312b · #2b2b31

Split-complementary

Open in tool →

#2b312e · #2b2e31

#2e312b · #2b3131 · #2e2b31

Contrast

#312b2b as textRatioAAAA largeAAAFix
Aaon white
13.9:1passpasspassPasses AAA — no fix needed.
Aaon black
1.51:1failfailfail
  • AA: use #837272 as the text (4.61:1)
  • AAA: use #a09292 as the text (7.02:1)
  • AA: or shift the background to #949494 (4.58:1)
  • AAA: or shift the background to #b8b8b8 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #312b2b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#312b2b reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #312b2b
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 #312b2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/312b2b-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