Color

#043f3d

#043f3d
hex#043f3d
rgbrgb(4, 63, 61)
hslhsl(178, 88%, 13%)
oklchoklch(0.333 0.055 191.2)
Closest name: Rich Black (#004040)Relative luminance 0.0392

Colors that go with #043f3d

Crimson, Sea Green and Teal 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 →

#3e0406

#043e1f · #04233e

#3c043e · #3e3c04

Split-complementary

Open in tool →

#3e0423 · #3e1f04

#1f043e · #3e0406 · #233e04

Contrast

#043f3d as textRatioAAAA largeAAAFix
Aaon white
11.77:1passpasspassPasses AAA — no fix needed.
Aaon black
1.78:1failfailfail
  • AA: use #098682 as the text (4.74:1)
  • AAA: use #0ba8a3 as the text (7.14:1)
  • AA: or shift the background to #a1a1a1 (4.56:1)
  • AAA: or shift the background to #c9c9c9 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043f3d as the background.

Brands using this color

Fonts for this mood

#043f3d reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043f3d
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 #043f3d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043f3d-a2bcbe-d45999-1f282d-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