Color

#40171f

#40171f
hex#40171f
rgbrgb(64, 23, 31)
hslhsl(348, 47%, 17%)
oklchoklch(0.27 0.064 10.3)
Closest name: Black-Hearted (#3e1825)Relative luminance 0.018

Tints & shades

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

Harmonies

Complementary

Open in tool →

#174038

#401733 · #402317

#1f4017 · #171f40

Split-complementary

Open in tool →

#174023 · #173340

#334017 · #174038 · #231740

Contrast

#40171f as textRatioAAAA largeAAAFix
Aaon white
15.44:1passpasspassPasses AAA — no fix needed.
Aaon black
1.36:1failfailfail
  • AA: use #bf4f65 as the text (4.52:1)
  • AAA: use #d18090 as the text (7.2:1)
  • AA: or shift the background to #8c8c8c (4.59:1)
  • AAA: or shift the background to #b0b0b0 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40171f as the background.

Brands using this color

Fonts for this mood

#40171f reads as warm, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40171f
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 #40171f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40171f-c49c9f-62cb83-2d231f-f1e9ef?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