Color

#283539

#283539
hex#283539
rgbrgb(40, 53, 57)
hslhsl(194, 18%, 19%)
oklchoklch(0.319 0.019 218.5)
Closest name: Aztec (#293432)Relative luminance 0.0329

Colors that go with #283539

Amber, Blue 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 →

#392c28

#283935 · #282c39

#392835 · #353928

Split-complementary

Open in tool →

#39282c · #393528

#352839 · #392c28 · #2c3928

Contrast

#283539 as textRatioAAAA largeAAAFix
Aaon white
12.66:1passpasspassPasses AAA — no fix needed.
Aaon black
1.66:1failfailfail
  • AA: use #5c7b84 as the text (4.62:1)
  • AAA: use #7e9ca5 as the text (7.19:1)
  • AA: or shift the background to #9c9c9c (4.61:1)
  • AAA: or shift the background to #c2c2c2 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283539 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#283539 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283539
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 #283539 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283539-9cb6c4-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