Color

#404154

#404154
hex#404154
rgbrgb(64, 65, 84)
hslhsl(237, 14%, 29%)
oklchoklch(0.382 0.032 282.4)
Closest name: Arsenic (#3b444b)Relative luminance 0.0551

Tints & shades

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

Harmonies

Complementary

Open in tool →

#545340

#404b54 · #494054

#544041 · #415440

Split-complementary

Open in tool →

#544940 · #4b5440

#54404b · #545340 · #405449

Contrast

#404154 as textRatioAAAA largeAAAFix
Aaon white
9.99:1passpasspassPasses AAA — no fix needed.
Aaon black
2.1:1failfailfail
  • AA: use #717294 as the text (4.54:1)
  • AAA: use #9395ae as the text (7.15:1)
  • AA: or shift the background to #b0b0b0 (4.61:1)
  • AAA: or shift the background to #d9d9d9 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #404154 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

#404154 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #404154
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 #404154 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/404154-9f9cc4-df924e-251f2d-e9edf1?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