Color

#1b643f

#1b643f
hex#1b643f
rgbrgb(27, 100, 63)
hslhsl(150, 57%, 25%)
oklchoklch(0.449 0.094 156.7)
Closest name: Bucolic (#1b6634)Relative luminance 0.0971

Colors that go with #1b643f

Charcoal, Crimson and Royal 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.

Real palettes that use #1b643f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#641b40

#1b641b · #1b6464

#401b64 · #64401b

Split-complementary

Open in tool →

#641b64 · #641b1b

#1b1b64 · #641b40 · #64641b

Contrast

#1b643f as textRatioAAAA largeAAAFix
Aaon white
7.14:1passpasspassPasses AAA — no fix needed.
Aaon black
2.94:1failfailfail
  • AA: use #248454 as the text (4.5:1)
  • AAA: use #2fac6e as the text (7.25:1)
  • AA: or shift the background to #cfcfcf (4.58:1)
  • AAA: or shift the background to #ffffff (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b643f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b643f reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b643f
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 #1b643f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b643f-a2beb3-d459d2-1f2d2c-e9f1ea?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