Color

#1b271d

#1b271d
hex#1b271d
rgbrgb(27, 39, 29)
hslhsl(130, 18%, 13%)
oklchoklch(0.258 0.025 149.4)
Closest name: Underworld (#1e231c)Relative luminance 0.0177

Tints & shades

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

Harmonies

Complementary

Open in tool →

#271b25

#1f271b · #1b2723

#1d1b27 · #271d1b

Split-complementary

Open in tool →

#231b27 · #271b1f

#1b1f27 · #271b25 · #27231b

Contrast

#1b271d as textRatioAAAA largeAAAFix
Aaon white
15.5:1passpasspassPasses AAA — no fix needed.
Aaon black
1.35:1failfailfail
  • AA: use #587e5e as the text (4.56:1)
  • AAA: use #759f7c as the text (7.01:1)
  • AA: or shift the background to #8c8c8c (4.61:1)
  • AAA: or shift the background to #b0b0b0 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b271d as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b271d reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b271d
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #1b271d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b271d-a2beaa-b14edf-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