Color

#2f313c

#2f313c
hex#2f313c
rgbrgb(47, 49, 60)
hslhsl(231, 12%, 21%)
oklchoklch(0.316 0.02 277.1)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0313

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3c3a2f

#2f373c · #342f3c

#3c2f31 · #313c2f

Split-complementary

Open in tool →

#3c342f · #373c2f

#3c2f37 · #3c3a2f · #2f3c34

Contrast

#2f313c as textRatioAAAA largeAAAFix
Aaon white
12.92:1passpasspassPasses AAA — no fix needed.
Aaon black
1.63:1failfailfail
  • AA: use #70758f as the text (4.63:1)
  • AAA: use #9296aa as the text (7.17:1)
  • AA: or shift the background to #999999 (4.53:1)
  • AAA: or shift the background to #bfbfbf (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2f313c as the background.

Brands using this color

Fonts for this mood

#2f313c reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2f313c
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 #2f313c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2f313c-9c9ec4-df834e-231f2d-e9eef1?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