Color

#0a171a

#0a171a
hex#0a171a
rgbrgb(10, 23, 26)
hslhsl(191, 44%, 7%)
oklchoklch(0.194 0.019 214)
Closest name: Black Stallion (#0e191c)Relative luminance 0.0075

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1a0d0a

#0a1a15 · #0a0f1a

#1a0a17 · #171a0a

Split-complementary

Open in tool →

#1a0a0f · #1a150a

#150a1a · #1a0d0a · #0f1a0a

Contrast

#0a171a as textRatioAAAA largeAAAFix
Aaon white
18.25:1passpasspassPasses AAA — no fix needed.
Aaon black
1.15:1failfailfail
  • AA: use #387f8f as the text (4.6:1)
  • AAA: use #47a3b8 as the text (7.2:1)
  • AA: or shift the background to #808080 (4.62:1)
  • AAA: or shift the background to #a1a1a1 (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 #0a171a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0a171a reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a171a
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 #0a171a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a171a-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