Color

#307871

#307871
hex#307871
rgbrgb(48, 120, 113)
hslhsl(174, 43%, 33%)
oklchoklch(0.525 0.072 186.5)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1525

Colors that go with #307871

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.

Real palettes that use #307871

Tints & shades

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

Harmonies

Complementary

Open in tool →

#783037

#30784d · #305b78

#713078 · #787130

Split-complementary

Open in tool →

#78305b · #784d30

#4d3078 · #783037 · #5b7830

Contrast

#307871 as textRatioAAAA largeAAAFix
Aaon white
5.18:1passpassfail
  • AAA: use #27625d as the text (7.02:1)
Aaon black
4.05:1failpassfail
  • AA: use #34837b as the text (4.68:1)
  • AAA: use #41a49a as the text (7:1)
  • AA: or shift the background to #f0f0f0 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #307871 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #307871
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 #307871 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/307871-a2bebe-d459a1-1f292d-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