Color

#407d55

#407d55
hex#407d55
rgbrgb(64, 125, 85)
hslhsl(141, 32%, 37%)
oklchoklch(0.537 0.09 153.5)
Closest name: Amazon (#387b54)Relative luminance 0.1641

Colors that go with #407d55

Charcoal, Royal Blue and Medium Violet Red 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 →

#7d4067

#497d40 · #407d73

#55407d · #7d5540

Split-complementary

Open in tool →

#73407d · #7d4049

#40497d · #7d4067 · #7d7340

Contrast

#407d55 as textRatioAAAA largeAAAFix
Aaon white
4.9:1passpassfail
  • AAA: use #326243 as the text (7.09:1)
Aaon black
4.28:1failpassfail
  • AA: use #44835a as the text (4.64:1)
  • AAA: use #55a571 as the text (7.01:1)
  • AA: or shift the background to #f7f7f7 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #407d55 as the background.

Brands using this color

mcpConnect your agent — build around #407d55
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 #407d55 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/407d55-a2beaf-c459d4-1f2d2a-eaf1e9?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