Color

#252b31

#252b31
hex#252b31
rgbrgb(37, 43, 49)
hslhsl(210, 14%, 17%)
oklchoklch(0.286 0.014 248.3)
Closest name: Cinder (#242a2e)Relative luminance 0.0234

Tints & shades

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

Harmonies

Complementary

Open in tool →

#312b25

#253131 · #252531

#31252b · #2b3125

Split-complementary

Open in tool →

#312525 · #313125

#312531 · #312b25 · #253125

Contrast

#252b31 as textRatioAAAA largeAAAFix
Aaon white
14.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.47:1failfailfail
  • AA: use #677889 as the text (4.62:1)
  • AAA: use #8b99a7 as the text (7.21:1)
  • AA: or shift the background to #919191 (4.54:1)
  • AAA: or shift the background to #b8b8b8 (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #252b31 as the background.

Brands using this color

Fonts for this mood

#252b31 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #252b31
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 #252b31 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/252b31-9cabc4-df514e-1f202d-e9f1f1?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