Color

#403a3c

#403a3c
hex#403a3c
rgbrgb(64, 58, 60)
hslhsl(340, 5%, 24%)
oklchoklch(0.355 0.009 355.3)
Closest name: Black Truffle (#463d3e)Relative luminance 0.0444

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3a403e

#403a3f · #403b3a

#3c403a · #3a3c40

Split-complementary

Open in tool →

#3a403b · #3a3f40

#3f403a · #3a403e · #3b3a40

Contrast

#403a3c as textRatioAAAA largeAAAFix
Aaon white
11.12:1passpasspassPasses AAA — no fix needed.
Aaon black
1.89:1failfailfail
  • AA: use #7e7276 as the text (4.56:1)
  • AAA: use #9e9497 as the text (7.14:1)
  • AA: or shift the background to #a6a6a6 (4.57:1)
  • AAA: or shift the background to #cfcfcf (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 #403a3c 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

#403a3c reads as neutral, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #403a3c
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 #403a3c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/403a3c-a2beb0-c859d4-1f2d2b-eaf1e9?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