Color

#21301d

#21301d
hex#21301d
rgbrgb(33, 48, 29)
hslhsl(107, 25%, 15%)
oklchoklch(0.29 0.039 139.2)
Closest name: Darkest Forest (#223311)Relative luminance 0.0253

Colors that go with #21301d

Charcoal, Dark Olive Green and Sienna lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #21301d

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2c1d30

#2a301d · #1d3022

#1d2130 · #301d21

Split-complementary

Open in tool →

#221d30 · #301d2a

#1d2a30 · #2c1d30 · #30221d

Contrast

#21301d as textRatioAAAA largeAAAFix
Aaon white
13.95:1passpasspassPasses AAA — no fix needed.
Aaon black
1.51:1failfailfail
  • AA: use #58804d as the text (4.61:1)
  • AAA: use #73a366 as the text (7.16:1)
  • AA: or shift the background to #949494 (4.6:1)
  • AAA: or shift the background to #b8b8b8 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21301d as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#21301d reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21301d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #21301d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21301d-a5bea2-7a4edf-1f2d22-eff1e9?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