Color

#21201c

#21201c
hex#21201c
rgbrgb(33, 32, 28)
hslhsl(48, 8%, 12%)
oklchoklch(0.243 0.008 95.4)
Closest name: Underworld (#1e231c)Relative luminance 0.0144

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1c1d21

#211e1c · #20211c

#1c2120 · #201c21

Split-complementary

Open in tool →

#1c2021 · #1e1c21

#1c211e · #1c1d21 · #211c20

Contrast

#21201c as textRatioAAAA largeAAAFix
Aaon white
16.3:1passpasspassPasses AAA — no fix needed.
Aaon black
1.29:1failfailfail
  • AA: use #797667 as the text (4.6:1)
  • AAA: use #9a9789 as the text (7.16:1)
  • AA: or shift the background to #878787 (4.54:1)
  • AAA: or shift the background to #ababab (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21201c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#21201c reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21201c
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 #21201c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21201c-c4c09c-62aacb-2a2d1f-f1ece9?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