Color

#397471

#397471
hex#397471
rgbrgb(57, 116, 113)
hslhsl(177, 34%, 34%)
oklchoklch(0.519 0.062 191.1)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1455

Colors that go with #397471

Charcoal, Amber and Blue 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 →

#74393c

#397454 · #395a74

#713974 · #747139

Split-complementary

Open in tool →

#74395a · #745439

#543974 · #74393c · #5a7439

Contrast

#397471 as textRatioAAAA largeAAAFix
Aaon white
5.37:1passpassfail
  • AAA: use #2f605d as the text (7.11:1)
Aaon black
3.91:1failpassfail
  • AA: use #40827f as the text (4.72:1)
  • AAA: use #51a4a0 as the text (7.17:1)
  • AA: or shift the background to #ebebeb (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #397471 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #397471
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 #397471 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/397471-a2bcbe-d4599b-1f282d-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