Color

#05171e

#05171e
hex#05171e
rgbrgb(5, 23, 30)
hslhsl(197, 71%, 7%)
oklchoklch(0.193 0.028 225.4)
Closest name: Black Stallion (#0e191c)Relative luminance 0.0074

Colors that go with #05171e

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 →

#1f0c05

#051f19 · #050b1f

#1f0517 · #171f05

Split-complementary

Open in tool →

#1f050b · #1f1905

#19051f · #1f0c05 · #0b1f05

Contrast

#05171e as textRatioAAAA largeAAAFix
Aaon white
18.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.15:1failfailfail
  • AA: use #1c7fa6 as the text (4.64:1)
  • AAA: use #23a0d1 as the text (7.02:1)
  • AA: or shift the background to #808080 (4.63:1)
  • AAA: or shift the background to #a1a1a1 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #05171e as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#05171e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #05171e
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 #05171e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/05171e-9cb4c4-df4e6b-1f232d-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