Color

#003d3a

#003d3a
hex#003d3a
rgbrgb(0, 61, 58)
hslhsl(177, 100%, 12%)
oklchoklch(0.325 0.056 189.3)
Closest name: Rich Black (#004040)Relative luminance 0.0364

Colors that go with #003d3a

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 →

#3d0003

#003d1c · #00223d

#3a003d · #3d3a00

Split-complementary

Open in tool →

#3d0022 · #3d1c00

#1c003d · #3d0003 · #223d00

Contrast

#003d3a as textRatioAAAA largeAAAFix
Aaon white
12.15:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #00857e as the text (4.66:1)
  • AAA: use #00a8a0 as the text (7.11:1)
  • AA: or shift the background to #9e9e9e (4.53:1)
  • AAA: or shift the background to #c7c7c7 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #003d3a as the background.

Brands using this color

Fonts for this mood

#003d3a reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #003d3a
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 #003d3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/003d3a-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