Color

#253137

#253137
hex#253137
rgbrgb(37, 49, 55)
hslhsl(200, 20%, 18%)
oklchoklch(0.305 0.02 229.8)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0287

Tints & shades

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

Harmonies

Complementary

Open in tool →

#372b25

#253734 · #252837

#372531 · #313725

Split-complementary

Open in tool →

#372528 · #373425

#342537 · #372b25 · #283725

Contrast

#253137 as textRatioAAAA largeAAAFix
Aaon white
13.35:1passpasspassPasses AAA — no fix needed.
Aaon black
1.57:1failfailfail
  • AA: use #5c7a8a as the text (4.61:1)
  • AAA: use #7e9ba9 as the text (7.15:1)
  • AA: or shift the background to #969696 (4.51:1)
  • AAA: or shift the background to #bdbdbd (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #253137 as the background.

Brands using this color

Fonts for this mood

#253137 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #253137
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 #253137 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/253137-9cb2c4-df4e64-1f232d-e9f1f0?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