Color

#0a4347

#0a4347
hex#0a4347
rgbrgb(10, 67, 71)
hslhsl(184, 75%, 16%)
oklchoklch(0.351 0.055 202.2)
Closest name: Rich Black (#004040)Relative luminance 0.0453

Colors that go with #0a4347

Crimson, Steel Blue 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 →

#470e0a

#0a472d · #0a2547

#470a43 · #43470a

Split-complementary

Open in tool →

#470a25 · #472d0a

#2d0a47 · #470e0a · #25470a

Contrast

#0a4347 as textRatioAAAA largeAAAFix
Aaon white
11.01:1passpasspassPasses AAA — no fix needed.
Aaon black
1.91:1failfailfail
  • AA: use #14828a as the text (4.59:1)
  • AAA: use #19a8b3 as the text (7.29:1)
  • 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 #0a4347 as the background.

Brands using this color

Fonts for this mood

#0a4347 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a4347
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 #0a4347 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a4347-a2b9be-df4e8a-1f262d-e9f1ee?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