Color

#283133

#283133
hex#283133
rgbrgb(40, 49, 51)
hslhsl(191, 12%, 18%)
oklchoklch(0.305 0.013 212.6)
Closest name: Nightmare Fuel (#293135)Relative luminance 0.0289

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#332a28

#283330 · #282c33

#332831 · #313328

Split-complementary

Open in tool →

#33282c · #333028

#302833 · #332a28 · #2c3328

Contrast

#283133 as textRatioAAAA largeAAAFix
Aaon white
13.31:1passpasspassPasses AAA — no fix needed.
Aaon black
1.58:1failfailfail
  • AA: use #63797e as the text (4.57:1)
  • AAA: use #849a9f as the text (7.1:1)
  • AA: or shift the background to #969696 (4.5:1)
  • AAA: or shift the background to #bdbdbd (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 #283133 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#283133 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283133
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #283133 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283133-a2b6be-df4e7a-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