Color

#21371a

#21371a
hex#21371a
rgbrgb(33, 55, 26)
hslhsl(106, 36%, 16%)
oklchoklch(0.31 0.057 138.5)
Closest name: Darkest Forest (#223311)Relative luminance 0.0313

Colors that go with #21371a

Dark Olive Green, Sienna and Steel Blue 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#311a37

#30371a · #1a3722

#1a2137 · #371a21

Split-complementary

Open in tool →

#221a37 · #371a30

#1a3037 · #311a37 · #37221a

Contrast

#21371a as textRatioAAAA largeAAAFix
Aaon white
12.91:1passpasspassPasses AAA — no fix needed.
Aaon black
1.63:1failfailfail
  • AA: use #4e843e as the text (4.69:1)
  • AAA: use #63a64e as the text (7.1:1)
  • AA: or shift the background to #999999 (4.53:1)
  • AAA: or shift the background to #bfbfbf (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 #21371a 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

#21371a reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21371a
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 #21371a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21371a-a5bea2-774edf-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