Color

#15371c

#15371c
hex#15371c
rgbrgb(21, 55, 28)
hslhsl(132, 45%, 15%)
oklchoklch(0.303 0.062 148.4)
Closest name: Darkest Forest (#223311)Relative luminance 0.0298

Colors that go with #15371c

Charcoal, Royal Blue and Rust 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 →

#371531

#1f3715 · #15372d

#1c1537 · #371c15

Split-complementary

Open in tool →

#2d1537 · #37151f

#151f37 · #371531 · #372d15

Contrast

#15371c as textRatioAAAA largeAAAFix
Aaon white
13.17:1passpasspassPasses AAA — no fix needed.
Aaon black
1.6:1failfailfail
  • AA: use #328543 as the text (4.57:1)
  • AAA: use #41aa56 as the text (7.11:1)
  • AA: or shift the background to #999999 (4.62:1)
  • AAA: or shift the background to #bdbdbd (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 #15371c as the background.

Brands using this color

Fonts for this mood

#15371c reads as dark, luxury, bold. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15371c
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 #15371c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15371c-a2beab-b64edf-1f2d28-ecf1e9?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