Color

#405e5b

#405e5b
hex#405e5b
rgbrgb(64, 94, 91)
hslhsl(174, 19%, 31%)
oklchoklch(0.457 0.036 188.2)
Closest name: Iridescent (#3a5b52)Relative luminance 0.0985

Colors that go with #405e5b

Blue, Blush Pink and Cadet 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.

Real palettes that use #405e5b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5e4043

#405e4c · #40525e

#5b405e · #5e5b40

Split-complementary

Open in tool →

#5e4052 · #5e4c40

#4c405e · #5e4043 · #525e40

Contrast

#405e5b as textRatioAAAA largeAAAFix
Aaon white
7.07:1passpasspassPasses AAA — no fix needed.
Aaon black
2.97:1failfailfail
  • AA: use #557c78 as the text (4.54:1)
  • AAA: use #709e99 as the text (7.04:1)
  • AA: or shift the background to #cfcfcf (4.54:1)
  • AAA: or shift the background to #ffffff (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #405e5b as the background.

Brands using this color

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

Palettes built around it

mcpConnect your agent — build around #405e5b
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 #405e5b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/405e5b-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