Color

#3b4754

#3b4754
hex#3b4754
rgbrgb(59, 71, 84)
hslhsl(211, 17%, 28%)
oklchoklch(0.393 0.027 250.6)
Closest name: Arsenic (#3b444b)Relative luminance 0.0608

Tints & shades

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

Harmonies

Complementary

Open in tool →

#54483b

#3b5354 · #3c3b54

#543b47 · #47543b

Split-complementary

Open in tool →

#543c3b · #53543b

#543b53 · #54483b · #3b543c

Contrast

#3b4754 as textRatioAAAA largeAAAFix
Aaon white
9.48:1passpasspassPasses AAA — no fix needed.
Aaon black
2.22:1failfailfail
  • AA: use #63778c as the text (4.55:1)
  • AAA: use #8898aa as the text (7.12:1)
  • AA: or shift the background to #b3b3b3 (4.52:1)
  • AAA: or shift the background to #dedede (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b4754 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

#3b4754 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b4754
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 #3b4754 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b4754-9cabc4-df534e-1f202d-e9f1f1?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