Color

#211f23

#211f23
hex#211f23
rgbrgb(33, 31, 35)
hslhsl(270, 6%, 13%)
oklchoklch(0.243 0.008 308.1)
Closest name: Night Demons (#201b20)Relative luminance 0.0142

Tints & shades

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

Harmonies

Complementary

Open in tool →

#21231f

#1f1f23 · #231f23

#23211f · #1f2321

Split-complementary

Open in tool →

#23231f · #1f231f

#231f1f · #21231f · #1f2323

Contrast

#211f23 as textRatioAAAA largeAAAFix
Aaon white
16.34:1passpasspassPasses AAA — no fix needed.
Aaon black
1.28:1failfailfail
  • AA: use #7a7382 as the text (4.6:1)
  • AAA: use #99939f as the text (7.03:1)
  • AA: or shift the background to #878787 (4.55:1)
  • AAA: or shift the background to #ababab (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #211f23 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#211f23 reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #211f23
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 #211f23 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/211f23-a2beb0-c859d4-1f2d2b-eaf1e9?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