Color

#28474d

#28474d
hex#28474d
rgbrgb(40, 71, 77)
hslhsl(190, 32%, 23%)
oklchoklch(0.376 0.038 211.3)
Closest name: Charcoal (#36454f)Relative luminance 0.0549

Colors that go with #28474d

Steel Blue, Sienna and Blush Pink 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 →

#4d2e28

#284d41 · #28344d

#4d2847 · #474d28

Split-complementary

Open in tool →

#4d2834 · #4d4128

#41284d · #4d2e28 · #344d28

Contrast

#28474d as textRatioAAAA largeAAAFix
Aaon white
10.01:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #477f8a as the text (4.67:1)
  • AAA: use #5d9fac as the text (7.02:1)
  • AA: or shift the background to #b0b0b0 (4.61:1)
  • AAA: or shift the background to #d9d9d9 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28474d as the background.

Brands using this color

Fonts for this mood

#28474d reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #28474d
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 #28474d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/28474d-a2b6be-df4e7c-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