Color

#21171a

#21171a
hex#21171a
rgbrgb(33, 23, 26)
hslhsl(342, 18%, 11%)
oklchoklch(0.218 0.017 358.8)
Closest name: Bats Cloak (#1f1518)Relative luminance 0.0101

Tints & shades

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

Harmonies

Complementary

Open in tool →

#17211e

#21171f · #211917

#1a2117 · #171a21

Split-complementary

Open in tool →

#172119 · #171f21

#1f2117 · #17211e · #191721

Contrast

#21171a as textRatioAAAA largeAAAFix
Aaon white
17.47:1passpasspassPasses AAA — no fix needed.
Aaon black
1.2:1failfailfail
  • AA: use #966976 as the text (4.58:1)
  • AAA: use #b08d97 as the text (7.1:1)
  • AA: or shift the background to #828282 (4.55:1)
  • AAA: or shift the background to #a6a6a6 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21171a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#21171a reads as warm, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21171a
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 #21171a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21171a-c49ca3-62cb79-2d211f-f1e9ef?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