Color

#2b403f

#2b403f
hex#2b403f
rgbrgb(43, 64, 63)
hslhsl(177, 20%, 21%)
oklchoklch(0.354 0.027 192.3)
Closest name: Sunken Harbour (#1c3d44)Relative luminance 0.0454

Colors that go with #2b403f

Amber, Blue and Blush Pink 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 →

#402b2c

#2b4034 · #2b3740

#3f2b40 · #403f2b

Split-complementary

Open in tool →

#402b37 · #40342b

#342b40 · #402b2c · #37402b

Contrast

#2b403f as textRatioAAAA largeAAAFix
Aaon white
11.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.91:1failfailfail
  • AA: use #547d7b as the text (4.6:1)
  • AAA: use #6f9f9d as the text (7.12:1)
  • AA: or shift the background to #a6a6a6 (4.52:1)
  • AAA: or shift the background to #cfcfcf (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 #2b403f as the background.

Brands using this color

Fonts for this mood

#2b403f reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b403f
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 #2b403f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b403f-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