Color

#21591d

#21591d
hex#21591d
rgbrgb(33, 89, 29)
hslhsl(116, 51%, 23%)
oklchoklch(0.412 0.109 142.2)
Closest name: Lincoln Green (#195905)Relative luminance 0.0756

Colors that go with #21591d

Charcoal, Blue and Emerald Green 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 →

#551d59

#3f591d · #1d5937

#1d2159 · #591d21

Split-complementary

Open in tool →

#371d59 · #591d3f

#1d3f59 · #551d59 · #59371d

Contrast

#21591d as textRatioAAAA largeAAAFix
Aaon white
8.36:1passpasspassPasses AAA — no fix needed.
Aaon black
2.51:1failfailfail
  • AA: use #32872c as the text (4.64:1)
  • AAA: use #40ad38 as the text (7.25:1)
  • AA: or shift the background to #bfbfbf (4.55:1)
  • AAA: or shift the background to #ebebeb (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21591d 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

#21591d reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #21591d
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 #21591d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/21591d-a2bea3-8f4edf-1f2d24-eef1e9?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