Color

#290021

#290021
hex#290021
rgbrgb(41, 0, 33)
hslhsl(312, 100%, 8%)
oklchoklch(0.191 0.084 337.4)
Closest name: Black Sabbath (#220022)Relative luminance 0.0058

Tints & shades

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

Harmonies

Complementary

Open in tool →

#002908

#1d0029 · #29000c

#212900 · #002129

Split-complementary

Open in tool →

#0c2900 · #00291d

#291d00 · #002908 · #000c29

Contrast

#290021 as textRatioAAAA largeAAAFix
Aaon white
18.81:1passpasspassPasses AAA — no fix needed.
Aaon black
1.12:1failfailfail
  • AA: use #db00af as the text (4.63:1)
  • AAA: use #ff42d9 as the text (7.03:1)
  • AA: or shift the background to #7d7d7d (4.57:1)
  • AAA: or shift the background to #9e9e9e (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #290021 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#290021 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #290021
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 #290021 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/290021-c19fb6-80cb62-2d1f24-efe9f1?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