Color

#253131

#253131
hex#253131
rgbrgb(37, 49, 49)
hslhsl(180, 14%, 17%)
oklchoklch(0.302 0.016 196.3)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0281

Colors that go with #253131

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 →

#312525

#25312b · #252b31

#312531 · #313125

Split-complementary

Open in tool →

#31252b · #312b25

#2b2531 · #312525 · #2b3125

Contrast

#253131 as textRatioAAAA largeAAAFix
Aaon white
13.44:1passpasspassPasses AAA — no fix needed.
Aaon black
1.56:1failfailfail
  • AA: use #5c7a7a as the text (4.52:1)
  • AAA: use #7c9c9c as the text (7.09:1)
  • AA: or shift the background to #969696 (4.54:1)
  • AAA: or shift the background to #bdbdbd (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #253131 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#253131 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #253131
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 #253131 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/253131-a2bbbe-d45994-1f272d-e9f1ed?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