Color

#27454f

#27454f
hex#27454f
rgbrgb(39, 69, 79)
hslhsl(195, 34%, 23%)
oklchoklch(0.371 0.04 221.3)
Closest name: Charcoal (#36454f)Relative luminance 0.0525

Colors that go with #27454f

Dark Olive Green, 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 →

#4f3127

#274f45 · #27314f

#4f2745 · #454f27

Split-complementary

Open in tool →

#4f2731 · #4f4527

#45274f · #4f3127 · #314f27

Contrast

#27454f as textRatioAAAA largeAAAFix
Aaon white
10.24:1passpasspassPasses AAA — no fix needed.
Aaon black
2.05:1failfailfail
  • AA: use #477d90 as the text (4.6:1)
  • AAA: use #629eb2 as the text (7.05:1)
  • AA: or shift the background to #adadad (4.56:1)
  • AAA: or shift the background to #d6d6d6 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #27454f as the background.

Brands using this color

Fonts for this mood

#27454f reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #27454f
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 #27454f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/27454f-9cb5c4-df4e70-1f242d-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