Color

#05181e

#05181e
hex#05181e
rgbrgb(5, 24, 30)
hslhsl(194, 71%, 7%)
oklchoklch(0.196 0.028 220.8)
Closest name: Black Stallion (#0e191c)Relative luminance 0.0078

Colors that go with #05181e

Charcoal, Amber and Blue 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 →

#1f0b05

#051f18 · #050c1f

#1f0519 · #191f05

Split-complementary

Open in tool →

#1f050c · #1f1805

#18051f · #1f0b05 · #0c1f05

Contrast

#05181e as textRatioAAAA largeAAAFix
Aaon white
18.17:1passpasspassPasses AAA — no fix needed.
Aaon black
1.16:1failfailfail
  • AA: use #1b7f9d as the text (4.57:1)
  • AAA: use #22a2c9 as the text (7.08:1)
  • AA: or shift the background to #808080 (4.6:1)
  • AAA: or shift the background to #a1a1a1 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #05181e as the background.

Brands using this color

Fonts for this mood

#05181e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #05181e
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 #05181e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/05181e-9cb6c4-df4e72-1f242d-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