Color

#0a4148

#0a4148
hex#0a4148
rgbrgb(10, 65, 72)
hslhsl(187, 76%, 16%)
oklchoklch(0.345 0.055 207.9)
Closest name: Rich Black (#004040)Relative luminance 0.0431

Colors that go with #0a4148

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 →

#48110a

#0a4830 · #0a2248

#480a41 · #41480a

Split-complementary

Open in tool →

#480a22 · #48300a

#300a48 · #48110a · #22480a

Contrast

#0a4148 as textRatioAAAA largeAAAFix
Aaon white
11.27:1passpasspassPasses AAA — no fix needed.
Aaon black
1.86:1failfailfail
  • AA: use #148190 as the text (4.57:1)
  • AAA: use #19a5b8 as the text (7.12:1)
  • AA: or shift the background to #a6a6a6 (4.63:1)
  • AAA: or shift the background to #cccccc (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a4148 as the background.

Brands using this color

Fonts for this mood

#0a4148 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a4148
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 #0a4148 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a4148-a2b8be-df4e83-1f262d-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