Color

#2c313f

#2c313f
hex#2c313f
rgbrgb(44, 49, 63)
hslhsl(224, 18%, 21%)
oklchoklch(0.314 0.026 269.5)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0309

Colors that go with #2c313f

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f3a2c

#2c3b3f · #302c3f

#3f2c31 · #313f2c

Split-complementary

Open in tool →

#3f302c · #3b3f2c

#3f2c3b · #3f3a2c · #2c3f30

Contrast

#2c313f as textRatioAAAA largeAAAFix
Aaon white
12.98:1passpasspassPasses AAA — no fix needed.
Aaon black
1.62:1failfailfail
  • AA: use #697596 as the text (4.59:1)
  • AAA: use #8d96b0 as the text (7.12:1)
  • AA: or shift the background to #999999 (4.56:1)
  • AAA: or shift the background to #bfbfbf (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #2c313f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#2c313f reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2c313f
live endpoint

Point 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.

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

analyze #2c313f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2c313f-9ca2c4-df724e-221f2d-e9eff1?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