Color

#004247

#004247
hex#004247
rgbrgb(0, 66, 71)
hslhsl(184, 100%, 14%)
oklchoklch(0.345 0.059 203.3)
Closest name: Rich Black (#004040)Relative luminance 0.0435

Colors that go with #004247

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 →

#470500

#004728 · #001f47

#470043 · #434700

Split-complementary

Open in tool →

#47001f · #472800

#280047 · #470500 · #1f4700

Contrast

#004247 as textRatioAAAA largeAAAFix
Aaon white
11.23:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #00818a as the text (4.51:1)
  • AAA: use #00a7b3 as the text (7.18:1)
  • AA: or shift the background to #a6a6a6 (4.61:1)
  • AAA: or shift the background to #cfcfcf (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #004247 as the background.

Brands using this color

Fonts for this mood

#004247 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #004247
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 #004247 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/004247-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