Color

#397974

#397974
hex#397974
rgbrgb(57, 121, 116)
hslhsl(175, 36%, 35%)
oklchoklch(0.533 0.066 188.6)
Closest name: Green Sleeves (#39766c)Relative luminance 0.1581

Colors that go with #397974

Charcoal, Amber and Champagne 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 #397974

Tints & shades

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

Harmonies

Complementary

Open in tool →

#79393e

#397954 · #395f79

#743979 · #797439

Split-complementary

Open in tool →

#79395f · #795439

#543979 · #79393e · #5f7939

Contrast

#397974 as textRatioAAAA largeAAAFix
Aaon white
5.05:1passpassfail
  • AAA: use #2e615d as the text (7.04:1)
Aaon black
4.16:1failpassfail
  • AA: use #3c807b as the text (4.57:1)
  • AAA: use #4da39c as the text (7.03:1)
  • AA: or shift the background to #f2f2f2 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #397974 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #397974
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 #397974 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/397974-a2bdbe-d4599f-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