Color

#043d3e

#043d3e
hex#043d3e
rgbrgb(4, 61, 62)
hslhsl(181, 88%, 13%)
oklchoklch(0.327 0.054 196.7)
Closest name: Rich Black (#004040)Relative luminance 0.0371

Colors that go with #043d3e

Crimson, Sea Green and Sienna 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 →

#3e0504

#043e22 · #04203e

#3e043d · #3d3e04

Split-complementary

Open in tool →

#3e0420 · #3e2204

#22043e · #3e0504 · #203e04

Contrast

#043d3e as textRatioAAAA largeAAAFix
Aaon white
12.05:1passpasspassPasses AAA — no fix needed.
Aaon black
1.74:1failfailfail
  • AA: use #098486 as the text (4.66:1)
  • AAA: use #0baaad as the text (7.37:1)
  • AA: or shift the background to #a1a1a1 (4.67:1)
  • AAA: or shift the background to #c7c7c7 (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #043d3e as the background.

Brands using this color

Fonts for this mood

#043d3e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #043d3e
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 #043d3e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/043d3e-a2babe-d45992-1f272d-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