Color

#334757

#334757
hex#334757
rgbrgb(51, 71, 87)
hslhsl(207, 26%, 27%)
oklchoklch(0.388 0.037 243)
Closest name: Arsenic (#3b444b)Relative luminance 0.059

Tints & shades

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

Harmonies

Complementary

Open in tool →

#574333

#335755 · #333557

#573347 · #475733

Split-complementary

Open in tool →

#573335 · #575533

#553357 · #574333 · #355733

Contrast

#334757 as textRatioAAAA largeAAAFix
Aaon white
9.63:1passpasspassPasses AAA — no fix needed.
Aaon black
2.18:1failfailfail
  • AA: use #577894 as the text (4.52:1)
  • AAA: use #7b99b2 as the text (7.04:1)
  • AA: or shift the background to #b3b3b3 (4.6:1)
  • AAA: or shift the background to #dedede (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #334757 as the background.

Brands using this color

Fonts for this mood

#334757 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #334757
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 #334757 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/334757-9cadc4-df4e53-1f212d-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