Color

#257474

#257474
hex#257474
rgbrgb(37, 116, 116)
hslhsl(180, 52%, 30%)
oklchoklch(0.512 0.075 195.1)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1415

Colors that go with #257474

Charcoal, Crimson and Amber 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 →

#742525

#25744d · #254d74

#742574 · #747425

Split-complementary

Open in tool →

#74254d · #744d25

#4d2574 · #742525 · #4d7425

Contrast

#257474 as textRatioAAAA largeAAAFix
Aaon white
5.48:1passpassfail
  • AAA: use #1f6161 as the text (7.14:1)
Aaon black
3.83:1failpassfail
  • AA: use #2a8484 as the text (4.73:1)
  • AAA: use #35a7a7 as the text (7.24:1)
  • AA: or shift the background to #ebebeb (4.6:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #257474 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#257474 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #257474
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 #257474 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/257474-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