Color

#0a1b1f

#0a1b1f
hex#0a1b1f
rgbrgb(10, 27, 31)
hslhsl(191, 51%, 8%)
oklchoklch(0.209 0.024 214.8)
Closest name: Black Stallion (#0e191c)Relative luminance 0.0095

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#1f0e0a

#0a1f18 · #0a111f

#1f0a1b · #1b1f0a

Split-complementary

Open in tool →

#1f0a11 · #1f180a

#180a1f · #1f0e0a · #111f0a

Contrast

#0a1b1f as textRatioAAAA largeAAAFix
Aaon white
17.65:1passpasspassPasses AAA — no fix needed.
Aaon black
1.19:1failfailfail
  • AA: use #2f8092 as the text (4.62:1)
  • AAA: use #3ca2b9 as the text (7.06:1)
  • AA: or shift the background to #828282 (4.59:1)
  • AAA: or shift the background to #a6a6a6 (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a1b1f as the background.

Brands using this color

Fonts for this mood

#0a1b1f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a1b1f
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #0a1b1f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a1b1f-a2b6be-df4e7a-1f252d-e9f1ef?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